Price: $139.99

CTEK MULTI US 7002 12-Volt Universal Battery Charger w/ Pulse Maintenance and Backup Power

Item # CTEK56353

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Our Price: $139.99

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ctek power inc battery chargers reconditions 8-step charger multi us 7002 12-volt universal w/ pulse maintenance and backup
ctek power inc battery chargers charger reconditions multi us 7002 12-volt universal w/ pulse maintenance and backup
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ctek power inc battery chargers charges and maintains charge reconditions
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ctek power inc battery chargers charger reconditions ctek56353
ctek power inc battery chargers charger reconditions multi us 7002 12-volt universal w/ pulse maintenance and backup
ctek power inc battery chargers charges and maintains charge reconditions ctek56353
ctek power inc battery chargers charges and maintains charge reconditions dimensions
ctek power inc battery chargers charger 8-step dimensions
ctek power inc battery chargers charges and maintains charge 8-step charger ctek56353
ctek power inc battery chargers reconditions 8-step charger ctek56353
ctek power inc battery chargers charger 8-step multi us 7002 12-volt universal w/ pulse maintenance and backup
ctek power inc battery chargers charger charges and maintains charge dimensions
ctek power inc battery chargers charges and maintains charge 8-step charger dimensions
ctek power inc battery chargers reconditions 8-step charger multi us 7002 12-volt universal w/ pulse maintenance and backup
ctek power inc battery chargers charger charges and maintains charge multi us 7002 12-volt universal w/ pulse maintenance backup

Customer Photos

ctek power inc battery chargers charger reconditions ctek56353

  • Battery Charger
  • Charges and Maintains Charge
  • 12 Volts
  • CTEK Power Inc
  • 8-Step Charger
  • Reconditions Battery
This powerful, all-weather eight-step charger uses a patented, pulse-maintenance system to charge, maintain and help recondition 12V batteries. Backup power supply allows you to change vehicle batteries without losing complicated program settings. Call 800-298-8924 to order CTEK Power Inc battery chargers part number CTEK56353 or order online at etrailer.com. Free expert support on all CTEK Power Inc products. Guaranteed Lowest Price and Fastest Shipping for CTEK MULTI US 7002 12-Volt Universal Battery Charger w/ Pulse Maintenance and Backup Power. Battery Chargers reviews from real customers.



CTEK Power Inc Battery Chargers - CTEK56353

This powerful, all-weather eight-step charger uses a patented, pulse-maintenance system to charge, maintain and help recondition 12V batteries. Backup power supply allows you to change vehicle batteries without losing complicated program settings.


Features:

  • Reliable, maintenance-free, 8-step system constantly monitors and maintains 12V battery charge
    • Won't overcharge or undercharge like common trickle chargers
    • Switches automatically to pulse-maintenance phase when full charge has been reached
    • Reduces risk of overheating, sulfation and premature battery failure
    • Makes use of an internal power supply during battery changes to preserve your vehicle settings
    • Restores the power capacity of stratified batteries w/ special Reconditioning Mode
  • Easy-to-use, quick-disconnect system
    • Includes 2 battery-cable attachment systems w/ Comfort Connect end plugs - charger plugs right in
      • Eyelet-terminal cable permanently attaches to battery terminals
      • Clamp-terminal cable temporarily clamps to battery terminals
  • Safe, versatile design
    • Approved for indoor and outdoor use
    • Prevents reverse-polarity mistakes
  • Convenient accessories (sold separately) provide additional security and convenience
    • Know your battery's charge level at a glance w/ optional LED-indicator battery cable
    • Reduce the hassle of charging multiple vehicles w/ additional battery-hookup cables


Specs:

  • Application: most starter and deep-cycle, 12V, lead-acid batteries - including wet, MF, AGM and most gel batteries
    • Charges batteries w/ capacities from 14 Ah - 150 Ah
    • Maintains batteries w/ capacities up to 225 Ah
  • Charge cycle: 8-step, fully automatic charger w/ pulse maintenance and Reconditioning Mode
  • Dimensions: 8-1/2" long x 3-1/2" wide x 1-7/8" tall
  • Includes:
    • 12V Battery charger (w/ 5' battery-connection cable and 6' power cord attached)
    • 1 Set of 16" battery cables w/ battery-terminal clips
    • 1 Set of 16" battery cables w/ M10 (10.5-mm) eyelet terminals
    • Owner's manual
    • Protective case
  • 5-Year warranty


CTEK MULTI US 7002 bulk charging time chart

This CTEK charger comes w/ two battery cables: one w/ clamp terminals and one w/ eyelet terminals. The 16" eyelet-terminal cable can be left attached to the battery, and the clamp-terminal cable is great for temporary connections.



CTEK MULTI US 7002 wiring cable w/ clamp and eyelet cables

Whenever you want to charge the battery, just plug CTEK's patented Comfort Connect attachment terminal into the receiving end on either of the provided battery cables.

CTEK MULTI US 7002 wiring cable w/ clamp terminals

CTEK MULTI US 7002 Charging Process

Superior and safe, this eight-step process (plus Supply Mode) uses switch-mode, pulse-maintenance technology.

  1. Desulfation stage is the initial charging phase. This stage uses electronic pulses to desulfate batteries by converting lead sulfate crystals back to usable sulfuric acid.
  2. Soft-start stage tests the battery to see whether it can be charged. If the battery is unable to hold the initial charge, the unit goes into Error Mode, alerting you that your battery must be replaced.
  3. Bulk stage is the main charging phase. This stage accounts for 80 percent of the charging process and uses a constant charge level.
  4. Absorption stage completes the charge (to virtually 100 percent) using diminishing current to prevent battery damage.
  5. Analysis stage kicks in if the pre-set maximum time needed for absorption is exceeded. The unit measures the battery voltage and stops the charging process, automatically lighting an error indicator if the battery is faulty.
  6. Recond mode is used to recondition a battery that has been severely discharged. After the battery has been charged in Normal Mode and analysis has been completed, the charger reconditions the battery w/ a constant current of 1.5A and a maximum voltage of 15.7V for up to 4 hours.
  7. Float-maintenance stage maintains a constant voltage of 13.6V during the first 10 days.
  8. Pulse-maintenance stage begins after the 10 days of float maintenance. This long-term stage maintains the battery at the optimum charge level of 95 to 100 percent by recognizing any drop in voltage and sending a corresponding pulse of current to keep the battery properly charged. Pulse maintenance can be continued for months at a time.

Supply mode - available only on this CTEK model - provides backup power to your vehicle while the battery is being changed. No more tiresome system resetting after battery changes.

CTEK US 7002 charging process chart

A goof-proof design distinguishes CTEK's new-generation chargers from the competition - you don't have to be a mechanical guru to keep your battery working at top efficiency. CTEK's patented charging system monitors your battery, providing exactly the charge it needs during each unique charging stage!

Protects the User

Your personal safety is paramount, and CTEK's spark-free, short-circuit-proof design incorporates a feature that prevents reverse polarity, keeping you safe. You simply cannot make a polarity mistake: The charger will not operate if it is attached incorrectly. In addition, the red alarm light on the charger alerts you if there is a reverse-polarity problem.



Protects the Battery

CTEK's patented, switch-mode, pulse-maintenance charging system is scientifically engineered to safely charge your battery by employing the most up-to-date technology. Using carefully monitored, low-grid voltage, CTEK's patented process differs from competitors' chargers in its ability to provide the precise final voltage that your battery needs to maintain optimum charge level. This sophisticated, interactive device will never overcharge or undercharge your battery. You may leave it attached to the battery for months, making it perfect for seasonal vehicle storage.

Won't cause overcharging or overheating. These together can cause gassing and excessive acid concentration that shortens the life of the battery by corroding the lead plates. When overcharged, the battery cells become dried out. Electrolytes "boil dry," generating excessive heat that can cause a fire.

Won't cause undercharging or sulfation. Undercharging can be just as damaging to your battery as overcharging because chronic undercharging leads to sulfation. Sulfation occurs when the lead and lead dioxide of the battery's plates react w/ sulfuric battery acid to produce lead sulfate. This in turn is converted back to lead, lead oxide and sulfuric acid. A small, unavoidable amount of sulfation and gassing naturally takes place as a result of the chemical processes occurring in lead-acid batteries. However, extensive undercharging causes extra lead sulfate to accumulate on the lead plates of the battery. Because the crystalline form of the sulfate cannot hold an electrical charge, excessive sulfation greatly diminishes the charging ability of the battery, eventually rendering it unusable.

Provides desulfation w/ a patented process. Desulfation is the reversal of sulfation damage. The CTEK charger's unique process not only prevents the undercharging that produces excess sulfation, it also includes a desulfating step that can often "revive" a lightly sulfated battery. It accomplishes this w/ carefully monitored electronic pulses of energy that help to break down the lead sulfate crystals, allowing the battery to accept charge once again.

Ensures consistent charging w/ low ripple-wave percentage rate. Ripple-wave percentage is the quantity of disturbances exhibited in current and voltage. Even minor variations in household current can cause undercharging or overcharging, but CTEK's low-ripple design regulates the incoming current before passing it on to your battery. This process can cause the charger to be a little slower than linear chargers but results in a healthier, more productive, longer-lasting battery.



Protects the Vehicle and Its Electronics

The charger is also safe for your vehicle. Its sophisticated circuitry is designed to be compatible w/ today's sensitive electronics and audio equipment. You can confidently charge your battery while it is still in the vehicle: no more hefting heavy batteries! CTEK's low ripple rate eliminates the danger of damaging electronic devices connected to the battery, and it prolongs the battery's service life. If you must replace your battery, the Supply Mode provides backup power to your vehicle's systems when you remove or replace the battery, sparing you the hassle of resetting your controls.

Closeup of indicator panel w/ descriptions

Indicator lights on the face of the charger light up to show the current charging stage.

Additional Specs:

  • Model: 56-353 (MULTI US 7002)
  • Input voltage: 100 VAC - 120 VAC, 50 Hz - 60 Hz
    • Output power is reduced at lower input voltage; a perfect charge will still be achieved
  • Maximum current demand 2.0A rms (at full charging current)
  • Charging current: 7A max
  • Back current drain: less than 3 mAh per month
  • Charging voltage: 15.7V
    • Nominal charging voltage: 12V
  • Ripple wave: less than 2 percent variance (max 150 mV rms, max 0.3A)
  • Battery cable fuse: 15A
  • Ambient temperature: -4 degrees F to +122 degrees F
    • Automatic reduction of power at increased ambient temperature
  • Cooling: natural convection
    • Do not cover the charger


56-353 CTEK MULTI US 7002 12V 8-Step, Pulse-Maintenance, Universal, Lead-Acid Battery Charger



CTEK56353 Installation InstructionsInstallation Details CTEK56353 Installation instructions



Premium - This item

CTEK MULTI US 7002 12-Volt Universal Battery Charger w/ Pulse Maintenance and Backup Power


CTEK MULTI US 7002 12-Volt Universal Battery Charger w/ Pulse Maintenance and Backup Power
CTEK Power Inc Battery Chargers

40 reviews

Code: CTEK56353

In Stock

Retail:$149.99

Our Price: $139.99


  • Battery Chargers
  • Battery Charger
  • Charges and Maintains Charge
  • Reconditions Battery
  • 12 Volts
  • 8-Step Charger
  • CTEK Power Inc


This powerful, all-weather eight-step charger uses a patented, pulse-maintenance system to charge, maintain and help recondition 12V batteries. Backup power supply allows you to change vehicle batteries without losing complicated program settings.

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Video of CTEK MULTI US 7002 12-Volt Universal Battery Charger w/ Pulse Maintenance and Backup Power


Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for CTEK Multi US 7002 12-Volt Universal Battery Charger Review

Today we are going to show you part number CTEK56353 from Ctek. This is the Multi US 7002 charger. And what this charger does is best for a variety of different vehicles. Lets cover the components. First off, you obviously have the charger itself, it has clamps that will clamp onto the battery itself and charge it, and also, it has a permanent mount of two ring terminals here that use this port to connect up to the charger itself. :28

The clamps also have the same type of port to hook up to the charger. Everything can fit in this bag right here that comes supplied with it too. Lets go ahead and cover the charger and a few more details. First of, we have it plugged in, you can see that it is getting power by the indicator light right there. Go ahead and hit the mode button, now thats normal, its going to fit the vast majority of batteries out there. Car, truck, boat batteries. :57

The next one, the snow flake is for deep cycle mode, that is for optima batteries. And also, if you have a regular car battery, and it is below 41 degrees, its really cold out, that type of charge it uses in that mode is a lot easier on the battery when it is in the cold. Next is a supply feature which is really cool, what it does is puts out a constant 13 volts so you can actually hook this up to your vehicle and supply the vehicle with power while you take out the battery or change the battery. It is a neat little system that it has built in there. And finally, it has a reconditioning mode. Basically you want to use that after your battery is fully charged, it really good when you have a battery or a deep cycle battery that has been fully discharged, this actually reconditions the battery again. All right we will go ahead and hook this up to the battery here, show you a more realistic setting. We will demonstrate how to hook up to this battery here. First off, it is gong to be black to negative and red to positive. Then what we will do is this port here will connect to the port of the Ctek charger, just snaps together like so. All right we have it hooked up, finally we will go ahead and plug it to our 1-10 outlet and then this is regular maintenance for your battery. 2:18

So we will go ahead and switch it to normal mode, as you can see here it is blinking. Right now the charger is in desulphation mode. That means that it is getting the battery ready to charge. After that it will do what is called a soft charge, and then it will work its way up to the bolt charge, and then absorption which will top off the battery. And then it will analyze the condition of the battery. What it will do next is go into float mode, and then to top off the battery to maintain it. And then after that, its left in storage leave it on there, you can leave it on there for weeks or months if you need to, it will stay in pulse mode to maintain the voltage in the battery. It is easy to get in a hurry or make a mistake, you can easily put the red to black and black to red, and what happens is the charger is smart enough to know that condition and match it to it. But it does not allow anything to short out, so you are still safe. In a typically application you have to change out the battery, you are going to go ahead and undo your terminals, and then your radio is going to loose all its presets, so then you have to go back and fix all your presets and that stuff. There is a way around that, with your charger in supply mode what we can do is go back and put on our charger, loosen up, this can also go on a different ground on the vehicle also. Go ahead and loosen this one up. There is still a little bit of power going to it, so you want to be careful you do not take your wrench and go to something that is grounded and fry it. This is the idea. 4:16

Move this out of the way and go ahead change the battery and not have to worry about losing our radio settings. You do not have to use the clamps to change out the battery too. Depending on the configuration of the terminals on your vehicle, you can probably use the ring terminals to hook up from the CTEK charger, and go ahead and change out your battery that way. Whichever works out the best for you. With that we have covered all the functions and details of part number CTEK56353 from CTEK.


Customer Reviews

CTEK MULTI US 7002 12-Volt Universal Battery Charger w/ Pulse Maintenance and Backup Power - CTEK56353

Average Customer Rating:  5.0 out of 5 stars   (40 Customer Reviews)

This powerful, all-weather eight-step charger uses a patented, pulse-maintenance system to charge, maintain and help recondition 12V batteries. Backup power supply allows you to change vehicle batteries without losing complicated program settings.

- CTEK56353

by: Mike N.04/04/2015


Excellent product, keeps my deep cycle battery up to charge. 183123


Comments

Still works great, no issues.

Mike N - 04/03/2016

17363

- CTEK56353

by: Todd06/07/2011


This is my second purchase for etrailer. The service has been excellent each time, and the quality of the products is also excellent. The CTEK battery charger is easy to use. I have used it on Optima batteries, which don't charge as well on conventional chargers. It works great. Just hook it up, and it stops when it is finished. 16321



- CTEK56353

by: BP Travel04/07/2015


Excellent product does as advertised. I read a comment from one of the eTrailer experts that this battery charger can provide 12VDC as a power supply. Hooked it up and it does exactly what I need - providing shore power a few lights and fans in my cargo (motorcycle) trailer. 183861



- CTEK56353

by: Tom12/26/2014


Excellent product but Made In China. 167002



- CTEK56158

by: Bob B. - etrailer.com Employee11/14/2013

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Got a booming radio that tends to kill the battery after a day of hanging out at the gravel bar. This charger I installed under the hood and ran the plug to the front bumper. So I have 2 options. 1. If there is power nearby just plug it in and no worries. 2. At the end of the day when back at the house just plug in overnight so battery is fully charged the next day without needing to leave the truck running to charge back up. 107360



- CTEK56864

by: Bill Y.09/28/2015

Review from a similar CTEK Power Inc MULTI in Battery Chargers


I really like the recondition feature on this charger. It reconditioned and charged my aging battery very promptly. I also like the compact size of the unit. Great product. 228077


Comments

My 4 year old truck battery started losing charge after sitting a few days. I removed it, checked the water which was a bit low, put it on recondition mod and recharged. It has been working like a new one for the past two months.

Bill Y - 09/27/2016

21273

- CTEK56864

by: Barney B05/24/2014

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Very high quality, compact, easy to use charger with many features. It is perfect for maintaining a charge on batteries that only get utilized periodically but can be used to charge as well. Would definitely recommend both the charger and etrailer.com. 132255


Comments

Still very pleased. Works great!!

Barney B - 05/26/2015

12045

- CTEK56158

by: Richard F.07/06/2015

Review from a similar CTEK Power Inc MULTI in Battery Chargers


The charger works great in the charge mode. An Optima battery took an overnight charge. And the weekend car also charged overnight. It is now on the maintenance mode. The two types of connections are very helpful. 209671


Comments

The charger works great. And it is easy to use.

Richard F - 07/27/2016

19727

- CTEK56864

by: Tom07/21/2016

Review from a similar CTEK Power Inc MULTI in Battery Chargers


I bought two of these based on the recommendations of people on the Jet-Ski forum I'm on. I also found out that Porsche recommends this brand for their vehicles. I use them to maintain the charge in my intermittently used car and Jet-Ski so the chargers are used a lot. In one year of use I haven't had any battery or charger problems. The unit is capable of maintaining a charge and restoring a charge to a flat battery. It is hard to measure the performance of a charger but compared to previous chargers I have used I think it does a great job of keeping the battery functional. 274426



- CTEK56864

by: Adam R. - etrailer.com Employee01/20/2014

Review from a similar CTEK Power Inc MULTI in Battery Chargers


I have another trickle charger that I've used for years on my older Harley, but it is a single-mode charger. I decided to get a second one so I do not have to constantly move the one from the bike to the lawn mower to the car, etc and chose this one based on excellent reports from my co-workers who also use this C-TEK unit. Having had this in use for about 3 weeks now I can report that it works well, offers several modes, including the winter storage mode I am using now, and came with very detailed instructions and plenty of adapters for various applications. I'd buy this again. 114205



- CTEK56158

by: Kevin12/26/2012

Review from a similar CTEK Power Inc MULTI in Battery Chargers


The CTEK 3300 is being used to keep my hot rod battery charged because it's not a daily driver. It took about one day and then the amber light turned green and has stayed that way for a month now. All I do is unplug the unit from the car and it starts right up. It sure is nice to be able to leave this one hooked up to the car in place of my older one that I would only use for a few hours at a time. So far I'm very happy with it and I would buy another one if I had two batteries to keep charged. 61891



- CTEK56158

by: Tom T.12/22/2016

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Good price, fast and friendly service. Items arrived on time and well packaged. I'm impressed that etrailer even sent a follow-up email to confirm my satisfaction. I have used the CTEK 3300 charger for over 5 years and it is outstanding. It has done a perfect job of charging/maintaining gel batteries on 3 vehicles and two tractors. Purchased two more to give family members as gifts. Thanks etrailer! 327189



- CTEK56158

by: Bruce K.12/18/2016

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Ordered this item to go with the CTEK battery charger I also ordered. Now I don't have to pop open the hood to connect the CTEK charger to the battery. The items were shipped quickly even with the poor weather conditions we were enduring. I've always liked their price and assistance available for merchandise purchased thru etrailer. Kudos for the staff at etrailer.com. 326852



- CTEK56158

by: Ken Young12/21/2016

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Just received this product today. I installed it in my Fiat 124 Spyder and it is charging now. Seems to be working OK and correctly 327115



- CTEK56864

by: David04/08/2013

Review from a similar CTEK Power Inc MULTI in Battery Chargers


The reconditioning mode on the 4.3 did in fact recondition my car battery when simply charging it with a CTEK 3.3 didn't. I conclude this based on the better retention of charge after the 4.3 than after the 3.3. As always, etrailer's service was prompt and courteous when I ordered a second 4.3 DS 74922



- CTEK56158

by: Calvin M.01/24/2015

Review from a similar CTEK Power Inc MULTI in Battery Chargers


The Ctek charger is small, but very effective. I have a vehicle that I only drive once or twice a month. Now I don't have to worry about the battery being dead and having to have the computer reprogram after jumping it off. Works great. Thanks Etrailer!! 171103



- CTEK56864

by: A.J.09/18/2014

Review from a similar CTEK Power Inc MULTI in Battery Chargers


After a recommendation from our mechanic, we purchased two CTEK trickle chargers and are extremely excited about how they will benefit the battery life of these cars over the next several years. All we can say now is, so far...so good. 151954



- CTEK56158

by: Martin M.09/29/2014

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Needed a way to keep my Scag's battery topped off in between mowings. Love the ability to hardwire an adapter to the battery that I can quickly connect or disconnect from charger. Works great and quick shipping too. Thanks etrailer! 153569



- CTEK56864

by: Gary11/09/2016

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Great performance in a light weight small package. Very sophisticated charging options to charge a wide variety of batteries in various temperature conditions. I trust this charger for my best quality batteries. 315287



- CTEK56158

by: Pete V10/01/2016

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Exactly what I needed etrailer had. Fast delivery everything I ordered was in great condition. Great service. Have ordered from etrailer several times, always on time and is exactly what was ordered. 302707



- CTEK56864

by: Dan S.12/20/2013

Review from a similar CTEK Power Inc MULTI in Battery Chargers


This CTEK charger got my large automotive battery up to full capacity in no time, and is maintaining it perfect through cold winter storage. As usual, prompt & well packaged delivery from etrailer! 110746



- CTEK56864

by: Thomas05/28/2016

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Powerful compact unit. Boat battery after winter storage charged right up. Even used the charger for smaller rechargeable batteries used in wireless speakers. Stores away very neatly in tool box 252754



- CTEK56864

by: Michael G10/29/2014

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Purchase battery charger to charge batteries in my new trailer. Charged batteries to full capacity and went into float mode. Very satisfied with product and would highly recommend it to others. 158388



- CTEK56864

by: Blake A08/26/2017

Review from a similar CTEK Power Inc MULTI in Battery Chargers


The complete charger is for a Mercedes Sprinter Motor Home, Pleasure Way. It works flawlessly in keeping the house battery charged and topped our as needed. Best charger I have found. 425540



- CTEK56158

by: Steve R07/13/2016

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Product arrived a day early, I immediately put it to use on a weak battery. Easy to assemble and use. Service and follow up by etrailer has been excellent. 271294


Comments

Its been a year, this charger gets infrequent use however, when I need it it works simply and effectively. Very satisfied.

Steve R - 07/14/2017

26093

- CTEK56158

by: Matt07/06/2015

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Using this on battery back sump pump system. Customer service was very helpful when I had questions on which model to order for the application. Thank you. 209839



- CTEK56158

by: Isaac D.12/23/2014

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Easy to follow directions, battery is charging at this present moment. Lightweight small and convenient. I have no doubt that it will satisfy my needs. 166722



- CTEK56864

by: AD03/25/2013

Review from a similar CTEK Power Inc MULTI in Battery Chargers


I have ordered products from etrailer for years and have never been disappointed in the products , price or promptness of delivery. 72365



- CTEK56158

by: Chet M.12/29/2016

Review from a similar CTEK Power Inc MULTI in Battery Chargers


So far it looks great. Easy to set up and use. I'm using it to charge two 6 volt batteries hooked up in series. 328741



- CTEK56864

by: Ted C.11/28/2012

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Have ordered from etrailer in the past, fast shipping and battery charger seems to operate fine! 60127



- CTEK56864

by: R Hochnadel02/20/2014

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Exactly what I needed to maintain several different size batteries at the same time. 117061



- CTEK56864

by: Emma E11/05/2016

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Easy to use, kept my battery up all winter without any problems. Would recommend. 313983



- CTEK56864

by: Michael03/12/2017

Review from a similar CTEK Power Inc MULTI in Battery Chargers


With this items I am fully satisfied - thanks for follow up - any time again 351641



- CTEK56158

by: Joel B.06/30/2011

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Great charger's that are made by CTEK E-Trailer's service is great and fast. 18284



- CTEK56864

by: L. Ott02/26/2015

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Arrived quickly and Works like a charm on my deep cycle, trailer battery. 176255



- CTEK56158

by: Robert LaBonte10/08/2013

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Very well made. Seems to have every needed option. 103020



- CTEK56158

by: J04/13/2016

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Great design / features, easy to use. 244072



- CTEK56158

by: Andy09/23/2016

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Works as advertised, no issues 297993



- CTEK56674

by: George J05/14/2017

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Thank you works GREAT 380259



- CTEK56158

by: Triple D Ranch07/22/2013

Review from a similar CTEK Power Inc MULTI in Battery Chargers


thank's work's good 90944


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  • How to Wire the 7-Way Charge Wire to Trailer Winch Battery and Protect the Vehicle Battery
  • For the best protection of your vehicles battery and wiring we recommend installing a 40 amp circuit breaker, # PK54540, inline on the charging wire going from your vehicle battery back to the trailer connector on your vehicle. If your vehicle has a factory 7-Way connector the charge line will be protected by a fuse in the power distribution box under the hood so adding a circuit breaker would not be needed. If you are concerned about drawing power from the vehicle battery when the vehicle...
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  • How to Wire 12V Battery in Enclosed Trailer to Power Trailer Lights Independent of 7-Way Connection
  • You are correct in your description of how to wire in a new auxiliary battery in your enclosed trailer. You will take the 7-Way's 12V power feed and route this to the positive terminal on the auxiliary battery, and you will ground the second battery to the trailer frame, as you described. You might refer to the linked article on trailer wiring to see the usual wiring configurations on trailer connectors. If you want to protect your vehicle battery from accidental discharge (such as if...
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  • Charging Six 6-Volt Batteries in a 12 Volt System with 1 Battery Charger
  • You can choose multiple batteries provided they are connected in parallel to remain a 12 volt system. You will connect the positive terminal at the first battery positive post and the negative terminal to the first battery negative post. If you have 2 banks of 3 batteries, you would have to separate the 2 banks of batteries and charge each set of 3 separately. You will want to use a larger charger that can handle a higher ah rating. The CTEK MULTI US 7002 12-Volt Universal Battery Charger,...
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  • Using an Auxiliary Vehicle Battery to Run 12 Volt Power on a Trailer
  • The issue is that if you have batteries mounted under the hood of the truck and you are trying to use the electrical system of the batteries to charge a trailer battery you will not be able to achieve sufficient current to charge up the battery, only maintain the charge that is already in it. Using the 12 volt power circuit on a 12 way will accomplish this task. You would route a wire from the 12 volt pin from the back of the trailer side connector to the positive terminal of the battery...
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  • Charging Trailer-Mounted Accessory Battery Using Tow Vehicle Battery
  • Using the vehicle electrical system to charge a discharged trailer-mounted battery is not feasible due to the physics involved. The distance between the batteries along with the fact that the accessory battery is passive and will not be pulling any power through the circuit will prevent enough power from the tow vehicle electrical system from reaching the accessory battery and effectively charging it. A larger wire like the 8 gauge wire you mentioned would allow a 12 volt accessory,...
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  • How to Charge Multiple Optima Batteries with the CTEK 7002 # CTEK56353 Battery Charger
  • I Contacted CTEK to be sure that I could give you the correct information on charging your 4 Optima Yellow Top batteries. He said that as long as the batteries are connected in parallel, still a 12 volt system, you can use the CTEK MULTI US 7002 12-Volt Universal Battery Charger w/ Pulse Maintenance and Backup Power, item # CTEK56353, to charge all 4 batteries at the same time. He also stated that the CTEK MULTI US 7002, is the charger that they recommend for the Optima Yellow Top and is...
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  • Recommended CTEK Battery Charger for Marine Battery Running Backup Sump Pump
  • What you are wanting to do is certainly possible, but because the # CTEK56158 does not have a maintenance mode, it could not be permanently connected to the battery and forgotten about. My contact at CTEK tells me that their 7002 model, part # CTEK56353 does have a maintenance mode and could be continuously used to maintain your marine battery while remaining connected to the battery, and while the battery remains connected to the pump. Once the charger senses a voltage drop in the...
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  • Parts Needed to Charge a Trailer Battery for a Winch
  • First, the wiring on a trailer connector can provide a maintenance charge to a 12 volt battery on a trailer but it will not be able to fully charge it. The 12 volt circuit on a 7-Way is already circuit protected so a separate fuse or breaker should not be needed. There is a way you can provide a charge to the battery from the truck. You would need to equip the truck and trailer with separate single pole connectors independent of the 7-Way. For the trailer side, you would need Pollak...
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  • Break Away System Replacement Battery Recommendation for a Circle J Horse Trailer
  • The battery that you use for a break away system needs to be able to power the trailer brakes on full for 15 minutes. A 12 volt battery rated for 5 amp hours would work but if you had 3 axles each with brakes you would benefit more from a 9 amp hour battery. Even a 12 volt car battery could be used but a battery this large would not charge up through the 12 volt circuit coming through the trailer connector. The batteries only that we carry, # HM20008 and # TK2023 are both rated for 5...
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  • How to Power Interior Lights on a Trailer Without Being Connected to a Tow Vehicle
  • I do have a solution for your situation, however, I do not recommend running two power sources to the same circuit on your trailer, this could cause a short. Instead, you will want to run the #4 wire from the 7-pin trailer connector to the positive post of the trailer battery. Next, connect the wire from the battery in the fuse box to the same location that the power wire from the trailer connector was connected to for the interior lights. This will put a 15-amp fuse between the battery...
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  • Can a CTEK Battery Charger be Used to Charge a Deep Cycle Battery While Using Lighting in a Trailer
  • Yes, you can use the CTEK US 3300 12-Volt Battery Charger, item # CTEK56158, to charge a battery while using the lights in the trailer. One thing to keep in mind is that the smaller battery charger will not be able to keep up with the lighting use in the trailer and the battery will eventually be drained, if not allowed to charge when the lights are not being used. It will not harm the charger. A better option is a charger that has a supply mode. The CTEK MULTI US 7002 12-Volt Universal...
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  • Can a Trailer Battery On a Dump Trailer Be Charged Using The 7-Way Trailer Connector
  • First, a trailer battery cannot be charged up from the 12 volt circuit on a 7-Way connector. The 7-Way can only provide a maintenance charge which will keep the battery at is current charge level. It is possible that the battery is back feeding when the truck is turned off and the trailer is still connected. You may also need to increase the size of the wiring. Wiring that is too small a gauge may not be able to handle the power draw. A short circuit or corrosion in the trailer connectors...
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  • CTEK Battery Charger Does Not Stay in Desulfation Stage for More than a Few Seconds
  • There is no set time for each charging phase for CTEK battery charger # CTEK56353. If the battery is at or above the terminal voltage preset level then it will go on to stage 2. This would mean that the battery does not necessarily have sufficient lead sulfate crystals that need to be converted back to sulfuric acid. Also, on batteries that are completely dead or have excessive sulfation, the charger will not be able to resurrect it. Check to make sure that the connection points on the...
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  • Battery Charger Recommendation for Charging 2 6-Volt Batteries
  • You need to find out if the 2 6-volt batteries at a time are wired in series or in parallel. If they are wired in parallel then the batteries will have an output voltage of 6-volts and would need a CTEK UC 800 6-Volt Battery Charger # CTEK56191. If they are wired in series the output voltage of the 2 batteries will be 12-volts. The CTEK Multi US 7002 12-volt Universal Charger # CTEK56353 that you referenced would be an excellent choice if this is the case. I attached a review video...
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  • Battery Charger Recommendation for an Optima Blue Top Deep Cycle Starting Battery
  • The recommended battery charger for the Optima Blue Top marine deep cycle and starting battery is the CTEK MULTI US 7002 12-Volt Universal Battery Charger w/ Pulse Maintenance and Backup Power, item # CTEK56353. The CTEK MULTI US 3300 12-Volt Universal Battery Charger w/ Pulse Maintenance, item # CTEK56158, is recommended for Red Top Optima Batteries and will work on the Blue Top models but will take much longer to bring the deep cycle battery to a full charge.
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  • Can Two 12 Volt Batteries Connected in Parallel be Charged Through a Switch Using a CTEK Charger
  • You can charge 2 batteries when they are connected in parallel using a CTEK battery charger such as # CTEK56158. However, it will take longer to charge the batteries when they are connected compared to if you were to charge each one separately. The best battery charger to use for charging batteries in parallel would be # CTEK56353. It has a higher amperage output and will charge faster. I have included a link to our FAQ article on battery chargers for you.
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  • Powering Fans in a Horse Trailer Without Leaving Trailer Connected to the Truck
  • To power the fans on your horse trailer when the trailer is disconnected from your truck, you will need to add a battery to the trailer. I recommend using a battery box and mounting the battery on the frame of the trailer so you can easily ground the battery to the frame. Once you have the battery installed, you will want to run the wire for the 12 volt circuit on the trailer side connector to the positive battery terminal. Next, connect the power wires from the fans to the battery....
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  • Will the CTEK DC Battery Charger Help to Bring an Auxiliary Optima Yellow Top Battery to Full Charge
  • You are correct, that an alternator is not designed to fully charge a depleted battery. In your case the Optima yellow top is being significantly discharged and will eventually need to be charged with a good battery charger like the CTEK MULTI US 7002, # CTEK56353, or the CTEK MULTI US 3300, # CTEK56158. The CTEK Battery Charger, item # CTEKD250S, can be used to boost the charge that your alternator is sending to the second, yellow top, battery that you are using to power the fridge....
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  • Battery Charger for Maintaining the Charge on a 2005 Ford Excursion Diesel with 2 Odyssey Batteries
  • The CTEK Battery Charger, item # CTEKD250S, is designed to charge an auxilliary battery form the vehicle alternator output or from the starting battery on the vehicle. This charger would not work for your application unless you have a solar panel that can be ran to the positive input side of the # CTEKD250S charger. In that case the solar power can be used to help maintain the vehicle batteries and keep them from overcharging while you are away from the cabin for extended periods. If...
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  • Can Power Inverter Be Used While Battery Is Being charged
  • A battery charger like CTEK MULTI US 7002 12-Volt Universal Battery Charger, part # CTEK56353 has some great features like pulse maintenance and backup power so you do not have to reset your system after the battery is charged. Using an inverter like you said you have will deplete the stored battery power and should not be used while the battery is being charged. When using the charger it will provide pulse maintenance to keep the battery fully-charged when you are not using the...
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  • Charging Two 6 Volt Batteries and One 12 Volt Battery with a CTEK Battery Charger
  • If your 6 volt batteries are connected to the single 12 volt battery the same way that they are attached to each other then you essentially have a 24 volt system. You would need to separate the two 12 volt systems and then charge them independently of each other (one at a time). Charging each battery one at a time will actually take the least amount of time. If your charger can do both 6 volt and 12 volt batteries make sure you have it set to the proper mode. If your system ultimately...
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  • Can the CTEK Battery Chargers Resurrect Nearly Dead Trailer Break Away Batteries
  • The CTEK US 3300 12-Volt Battery Charger, # CTEK56158, may be able to resurrect your batteries but if they were dead long enough, they would probably be too far gone to bring back to working order. The best bet for this scenario would be the CTEK MULTI US 7002 12-Volt Universal Battery Charger, # CTEK56353, because it has a special reconditioning mode that restores the power capacity of stratified batteries. The 7002 also has an 8-step charging process.
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  • How to Use Trailer Running Lights as Accent Lights When Connected to Campground 110 Volt Electric
  • To use your trailer running lights as accent lights with the trailer plugged into 110 volts, you will need to wire in a 110 volt to 12 volt converter to the 4-Way connector on your trailer. With your trailer plugged into the campground electric, you will plug the converter into an 110 volt outlet on the trailer. Next, from the 12 volt outlet side of the converter you will need to wire a ground wire to the white (ground wire) on your 4-Way connector. Then, run a wire from the 12 volt...
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  • CTEK Battery Charger has Been in the Desulfation Stage for 2 Days
  • If the battery was completely dead to start with (a "bad" battery) then not even a CTEK charger can resurrect it. If the battery was not dead or considered a dead battery then either it really needs that much desulfation or it could be that the ground connection is not good. This happens with my CTEK charger sometimes if I do not have it grounded to a good, solid bare metal surface. You may need to try taking some sand paper to where you have the charger grounded to get the most suitable...
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  • How To Charge Batteries To Run Aux Circuits in Truck Tool Box without Discharging Truck Battery
  • On the output post of your dual alternators you will need to run a thick gauge wire from there to the positive post of the batteries you plan on installing in the tool box of your truck. This will put a decent charge on those batteries while you are driving. To prevent the batteries from discharging your truck batteries you will also need to install the # TR118665 isolator on this charge line. This will prevent the circuit from the battery of your truck to the battery in your tool box...
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  • Charging Two 6 Volt Batteries in a Series to Create a 12 Volt
  • Charging two 6 volt batteries by your alternator through your starter via a Blue Seas switch isn't going to work because 6 volt systems are not as common anymore. Blue Seas currently only offers 12 and 24 Volt switches. Actually, your best option and what I recommend is the CTEK UC 800 6-Volt charger # CTEK56191. It's a pulse maintenance system to charge 6 Volt batteries. If you wire the batteries in series that produces an output of 12 volts, then the CTEK 7002 12-volt battery charger...
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  • Dead Batteries from Accidental Tripping of Trailer Break Away
  • Yes, it is indeed likely that your trailer breakaway batteries were depleted from the accidental tripping of the breakaway switch (but good for you for doing the yard work!). If your main trailer batteries have a charge line to feed the breakaway battery then they could have been depleted as well. Breakaway batteries are required to be able to apply full braking power (in the event of a disconnect) for about 15 minutes; this may vary slightly depending on the particular system and the number...
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  • Does the Battery Charger in My Truck Camper Shut Down When Fully Charged and What to Do if Not
  • I will be glad to try to help. I am guessing here, but I believe what you are saying is that your truck camper has a battery charger that functions when you are connected to shore, household, power. If this is the case, you should contact the camper manufacturer to find out if the charger has a system for checking the battery charge level and shutting down when the battery is fully charged. I imagine the charger in the trailer is set up this way. If the manufacturer cannot provide this...
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  • Will Towing Vehicle Provide Charge To Trailer Battery Through Trailer Connector
  • The battery on the trailer will not charge if it is attached to the 12V power wire from the towing vehicle. It will provide a small amount of current that helps maintain the current charge of the trailer battery. I recommend using a battery charger like the CTEK MULTI US 7002 12-Volt Universal Battery Charger, part # CTEK56353. This charger features pulse maintenance and will not overcharge the battery like many of the common chargers do.
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  • Wiring a 2004 Honda CR-V to Tow 1976 Scamp Camper
  • Lets start with the CR-V. After confirming that the weight of the trailer plus anything loaded on it is within the towing capacity of the vehicle, you will need to convert the existing 4-pole to a 7-way by using an adapter, part # 37185. According to my research, the 2004 CR-V is rated for towing 1500 lbs. The adapter will plug directly into your existing 4-pole, which will provide lighting functions to the trailer. The adapter will have 4 wires remaining. The white wire grounds to the...
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Video Edited:
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Expert Research:
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Expert Research:
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Updated by:
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