View Cart
CTEK MULTI US 3300 12-Volt Universal Battery Charger w/ Pulse Maintenance

CTEK MULTI US 3300 12-Volt Universal Battery Charger w/ Pulse Maintenance

Item # CTEK56158

lowest price pledge

Retail:$74.99

Our Price: $69.99

You Save: 7%
Battery Chargers

Orders above $99 qualify for Free Shipping

Shipping Weight: 1.95 lbs

Quantity: 
In Stock, Ships Today
CTEK Power Inc AC to DC Battery Chargers - CTEK56158
zoom in icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.
Please enter a valid email address.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

pop out icon replay 360 icon
horizontal rotate icon

Product Images

In Use/Installed

Customer Photos


  • Battery Charger
  • CTEK Power Inc
  • Car/Truck/SUV
  • RV/Camper
  • Lawn Mower
  • Boat
  • Wall Outlet to Vehicle Battery
  • AC to DC
  • 12V
  • Charges/Maintains
  • 75 Ah
This powerful, all-weather, four-step charger uses a patented, pulse-maintenance system to charge and maintain all household 12V batteries - cars, campers, mowers, trucks and boats. A practical battery charger fits most applications. Call 800-298-8924 to order CTEK Power Inc battery chargers part number CTEK56158 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 3300 12-Volt Universal Battery Charger w/ Pulse Maintenance. Battery Chargers reviews from real customers.


  • All Info
  • Reviews (62)
  • Q & A (380)
  • Videos (3)
  • Photos
  • Why etrailer?

CTEK Power Inc Battery Chargers - CTEK56158

This powerful, all-weather, four-step charger uses a patented, pulse-maintenance system to charge and maintain all household 12V batteries - cars, campers, mowers, trucks and boats. A practical battery charger fits most applications.


Features:

  • Reliable, maintenance-free, 4-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
  • 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
    • Offers (3) 12V current modes
      • Motorcycle icon: lower current for smaller 12V batteries
      • Car icon: higher current for larger 12V automobile and marine batteries
      • Snowflake/AGM icon: special winter mode designed for charging and maintenance in cold weather; also recommended by many AGM battery manufacturers like Optima, Maxima and Odyssey
  • 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 1.2 Ah - 75 Ah
    • Maintains batteries w/ capacities up to 120 Ah
  • Charge cycle: 4-step, fully automatic charger w/ pulse maintenance
  • Dimensions: 6.5" long x 2-3/8" wide x 1.5" 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/ M6 (6.4-mm) eyelet terminals
    • Owner's manual
    • Protective case
  • 5-Year warranty
CTEK MULTI US 3300 bulk charging time chart

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

CTEK MULTI US 3300 Charger w/ both 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.

Close-up of CTEK's Comfort Connect plugs

CTEK MULTI US 3300 Charging Process

Safe, four-step process 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. Bulk stage is the main charging phase. This stage accounts for 80 percent of the charging process and uses a constant charge level.
  3. Absorption stage completes the charge (to virtually 100 percent) using diminishing current to prevent battery damage.
  4. Pulse-maintenance stage begins 18 hours after the battery is fully charged. In this stage the charger 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.
CTEK MULTI US 3300 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 or dealing w/ tiresome system resetting! CTEK's low ripple rate eliminates the danger of damaging electronic devices connected to the battery, and it prolongs the battery's service life.



CTEK MULTI US 3300 indicator chart

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


Additional Specs:

  • Model: 56-158 (MULTI US 3300)
  • 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
  • Current: 1.1A rms (at full charging current)
  • Charging current: 0.8A - 3.3A max
  • Back current drain: 1.3 mAh per month
  • Charging voltage: 14.4V - 14.7V
    • Nominal charging voltage: 12V
  • Ripple wave: less than 2 percent variance (max 50 mV rms, max 0.13A)
  • 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


56-158 CTEK MULTI US 3300 12V 4-Step, Pulse-Maintenance, Lead-Acid Battery Charger

CTEK56158 Installation InstructionsInstallation Details CTEK56158 Installation instructions



Video of CTEK MULTI US 3300 12-Volt Universal Battery Charger w/ Pulse Maintenance


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




Video Transcript for CTEK Power Inc Battery Chargers - Battery Charger - CTEK56158 Review

Today, we're going to take a look at the Ctek Multi US 3,300 12-volt universal battery charger with pulse maintenance. Now, this is a nice, reliable, maintenance-free, 4 step system that'll constantly monitor and maintain your 12-volt battery charge. It won't overcharge or undercharge like your common trickle chargers will do. It does switch automatically to pulse maintenance phase when the full charge has been reached, and it will reduce the risk of overheating, any sulfation, and premature battery failure. It uses the very easy-to-use quick disconnect system right here. It includes these 2 battery cable attachment systems that have the Comfort Connect end plugs that'll plug right into the charger here. First one I want to show you is the clamp terminal cable.

This will temporarily clamp to your battery terminals. Just clamp that to the positive and negative posts. Here's your Comfort Connect plug, and you can see the charger end. Just push it right together. There's a little tab there that'll lock them into place.

To remove it, just push down on that tab, and it releases it. It's a very quick connection, just like that. Now, the other cable it comes with, this is the eyelet terminal cable. This is if you're going to permanently attach the cable to your battery terminal. You attach these to the positive and negative posts, and you can see on this end, it again has the Comfort Connect, but this one, because it'll be permanently in your vehicle, has a nice plug on it, to protect those terminals from any elements. Now, both of them, you can see, they do have an inline fuse holder in both of them.

It includes a 50 amp fuse to protect them. This system is a safe, versatile design. It's approved for indoor and outdoor use, prevents reverse polarity mistakes. Now, it does offer 3 12-volt current modes. The modes are right down here. The first light is the on or off light, and to switch to a different mode, there's a button right here that you just push, and it'll go across.

The first mode pictures a motorcycle icon. That's a lower current mode for smaller 12-volt batteries. If you push the button again, it'll go over to the car icon. That's a higher current for a larger 12-volt automobile marine batteries. Then, if you push it again, it'll go over to the snowflake, or this AGM icon. That means it's a special winter mode. It's designed for charging and maintenance in cold weather. It is also recommended by many of the AGM battery manufacturers like Optima, Maxima, and Odyssey. Now, along with this system, Ctek does offer convenient accessories that we do sell separately on our website, that'll provide additional security and convenience. They do sell extra hookup cables like these here, if you need to buy them for extra vehicles. They also sell an optional LED indicator battery cable, that it'll show on the custom connect, it'll have 3 lights that'll show the battery's charge level at a glance. Either one of those are a nice accessory to add. We do sell those on our website separately. Application for this is most starter and deep-cycle 12-volt lead acid batteries, including wet batteries, MF, AGM, and most gel batteries, charges batteries with capacities from 1.2 amp hours up to 75 amp hours, and it'll maintain batteries with capacities up to 120 amp hours. The charge cycle on this is a 4 step, fully automatic charger, again, with pulse maintenance. It includes everything shown here. The 12-volt battery charger has a 6 foot power cord attached to it. On the other end is the 5 foot battery connection cable with the Comfort Connect plug on the end. The 2 cables I mentioned earlier, they're both 16 inches in length. You have the battery terminal clips on this cable, and then the eyelet terminal's on this one. It comes with a nice, thick owner's manual that'll describe all the procedures and how to do them. Then, this nice, protective case that you can open up, and it's large enough to put all the items in and keep them all in one area, so you don't lose anything. Last thing I want to give you is the dimension on the charger itself, just so you know how large this is. The length on it, edge to edge, is right at 6 1/2 inches. The width, from one side to the other side, is right at 2 3/8 inches, and the overall height, top to bottom, 1 1/2 inches tall. That should do it for the review on the Ctek Multi US 3,300 12-volt universal battery charger with pulse maintenance.


Customer Reviews

CTEK MULTI US 3300 12-Volt Universal Battery Charger w/ Pulse Maintenance - CTEK56158

Average Customer Rating:  4.9 out of 5 stars   (62 Customer Reviews)

This powerful, all-weather, four-step charger uses a patented, pulse-maintenance system to charge and maintain all household 12V batteries - cars, campers, mowers, trucks and boats. A practical battery charger fits most applications.

- CTEK56158
by:

Have been very impressed with this product Very easy to use and has saved several batteries that seemed unchargeable I have one mounted permanently in my car trailer, and bought a second one to keep on hand in the garage. Bought a third one for my son 594102



- CTEK56158
by:

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



- CTEK56158
by:

thank's work's good 90944



- CTEK56158
by:

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:

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



- CTEK56158
by:

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



- CTEK56158
by:

Too early to tell 614845



- CTEK56158
by:

I installed on my 2017 Polaris ranger, this charger keeps my battery at 100%. I keep it plugged in when not in use. Very easy to install, also on dash of the Polaris the plug snaps right in vacant spot and looks as if it came from factory that way. Very happy with charger! 607801



- CTEK56158
by:

Great product and seller. Beats spending $395 at Porsche dealership. 590679



- CTEK56158
by:

Very good product. 562782



- CTEK56158
by:

I used this for my boat batteries. 472485



- CTEK56158
by:

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


Comments

Outstanding. Works perfect .... Same as day one.

Tom T - 12/23/2017

32223

- CTEK56158
by:

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:

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



- CTEK56158
by:

Works as advertised, no issues 297993



- CTEK56158
by:

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:

Great design / features, easy to use. 244072


Comments

Yet another good reason I do business with etrailer, you actually follow up. You do know that most companies talk about doing that but never do, right ? The CTEK still working great, one of the best things about it is the level of charge monitor. All I have to do is look and see if its a green or yellow flashing LED and charge if yellow.

J - 02/11/2018

34584

- CTEK56158
by:

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

- CTEK56158
by:

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



- CTEK56158
by:

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



- CTEK56158
by:

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



- CTEK56158
by:

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



- CTEK56158
by:

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:

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



- CTEK56353
by:

Review from a similar CTEK Power Inc MULTI in Battery Chargers


We have used the C-Tek chargers for many years for vehicle prototype development, and it is the only brand and model that we use. Our normal supplier did not have this item in stock. I searched online for someone who could supply our needs as we were behind on a project. Etrailer had this item in stock. They offered great customer service and fast shipping. We ordered 4 chargers. We will start using Etrailer.com in the future for the C-Tek and other items. 479791


Comments

Great

Scott - 02/28/2019

49968

- CTEK56864
by:

Review from a similar CTEK Power Inc MULTI in Battery Chargers


So far so good 553367



- CTEK56864
by:

Review from a similar CTEK Power Inc MULTI in Battery Chargers


This product has performed as advertised. Instructions were fine. I use it on my Lawn Tractor over the winter months. 511949



- CTEK56864
by:

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

- CTEK56864
by:

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Real purchaser comment; no bot BS that makes me skeptical of many reviews. CTEK 4.3 lead-acid battery charger/tender product as advertised & researched across several internet sites/blogs arrived well packaged via free shipping and in short time given holiday season. My first-time purchase experience with eTrailer superb; good service and most competitve price found among several retailers 460653



- CTEK56353
by:

Review from a similar CTEK Power Inc MULTI in Battery Chargers


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:

Review from a similar CTEK Power Inc MULTI in Battery Chargers


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


Comments

Still works great, no issues.

Mike N - 04/03/2016

17363

- CTEK56864
by:

Review from a similar CTEK Power Inc MULTI in Battery Chargers


The CTEK 4.3 battery charger is working well for me. I needed one charger that would work for my smaller motorcycle batteries as well as my truck and sports car. The CTEK makes it easy to switch to each application. As usual etrailer delivered quickly. The only caveat is the battery terminal clamps are a somewhat odd shape. They work well on a auto battery but have a bit of difficulty locking on the smaller motorcycle terminals. Not a deal killer at all. 472402



- CTEK56353
by:

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Great chargers. Seems like the plastic used in the proprietary connectors could be better quality. Otherwise doing a great job keeping batteries in good shape. 640056



- CTEK56353
by:

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Works well 593068



- CTEK56353
by:

Review from a similar CTEK Power Inc MULTI in Battery Chargers


I have had great luck with Ctek chargers. E-trailer is always a great vendor tobpurchase from. 588677



- CTEK56864
by:

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Purchased 2 CTEK battery chargers and maintainers. They arrived quickly, were well packed, and worked perfectly. Excellent product if you travel for long periods and don't want your batteries to go flat. Very pleased with my purchase and the service from etrailer. Thanks. 585816



- CTEK56864
by:

Review from a similar CTEK Power Inc MULTI in Battery Chargers


I was needing a “trickle charger” to maintain my engine batteries on my 2007 Fleetwood Providence 39V. I chose this unit as it is small and I could connect it directly to my batteries by way of the supplied terminals which connect to the charging unit. I placed the charger in the compartment next to the batteries so it would not be directly in the same area as the batteries themselves. I attached the charger to the wall using 3M tape and ran the charging cable through a hole where other cables were going into the battery compartment. I’m hoping this will keep the batteries fully charged should I need to start the motorhome in the cold weather. 585337



- CTEK56864
by:

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Performs as expected. Compact size is a plus for traveling. I use it regularly ro desulfate my trolling motor batteries. 576179



- CTEK56353
by:

Review from a similar CTEK Power Inc MULTI in Battery Chargers


I purchased a C Tek battery charger and it is much more advanced than the Battery Tenders that I have used for years. While the Battery Tenders do a good job of keeping a battery up, the C Tek can in some cases restore a battery that is sulphated. I like it as it is also a power supply if you want to change your battery and not loose the settings in your car. 568609



- CTEK56864
by:

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Works well 567757



- CTEK56353
by:

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Good product 546444



- CTEK56864
by:

Review from a similar CTEK Power Inc MULTI in Battery Chargers


I have used CTEK products before and I am very pleased with its use during the winter months for battery management. This recent order is my second CTEK and I plan not only to use it to maintain battery levels on my C7 corvette , but on other systems as well. Your price and shipping offers are excellent and I would recommend your service to anyone interested in battery chargers. 497062



- CTEK56353
by:

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Excellent product - replaced a CTEK 3300. I will likely replace 3 more CTEK 3300 with the CTEK 7002. Great service by Shaun on the phone who enabled shipping overnight when I really needed it. Very courteous and professional. Thank You !!! 470415



- CTEK56864
by:

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



- CTEK56674
by:

Review from a similar CTEK Power Inc MULTI in Battery Chargers


Thank you works GREAT 380259



- CTEK56864
by:

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



- CTEK56864
by:

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



- CTEK56864
by:

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:

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:

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


Comments

This continues to be a great product. Have charged things like house generator battery, DR road grader battery, Yamaha Rhino battery, a variety of rechargeable solar items. Great compact item. Thanks for asking Please note, I really like shopping at etrailer. Great service quick delivery, plus I don’t have to drive all over town. Also great “how to” video’s

Thomas - 01/26/2018

33753
54
66
Show More Reviews

Ask the Experts about this CTEK Power Inc Battery Chargers
Do you have a question about this Battery Charger?


  • How to Charge a Trailer Battery for Use with a Bulldog Jack
  • What you described is actually the best solution! Connecting your battery to 12V Power wire from the 7-Way on your trailer is a great way to provide a maintenance charge on your battery to operate a Bulldog jack like part # BD500199. Mounting a battery inside a box like part # 329-HM300BKS inside your trailer will further help to keep your battery safe from the elements (although battery boxes do a pretty good job at that). Please note that the 12V power from your vehicle will not...
    view full answer...

  • LED Strip Lighting and Battery Charger for Interior of 18-Foot Enclosed Trailer
  • The LED strip light I suggest based on your trailer length is the Optronics 17-foot weatherproof model # UCL90CB. This light strip comes on a reel and has a peel-and-stick 3M adhesive backing for easy installation. You can see this item in the linked video. The strip can even be cut to length. Multiple strips can be linked together using parts # A90P1B and # A90PB which will make it easy to link lights strips on each side of the trailer as well as on the ceiling. I do recommend using...
    view full answer...

  • Installing 7-Way and Wiring for Auxiliary Battery Charging
  • For your 2003 Ford E150 hi top conversion van, because you have a 4 way connector, you can use the Adapter 4-Pole to 7-Pole and 4-Pole # 37185. This will connect to your 4-way and then you can simply connect the white ground wire to a bare metal surface and then use # 10-1-1 sold by the foot to connect the black wire on the connector to circuit breaker # 9510 and then to the positive terminal on your vehicle battery. This will get your vehicle ready to send the 12V power. Then on your...
    view full answer...

  • How Long Can MaxxFan Roof Vent be Powered From Sprinter Battery with Engine Off
  • It's really difficult to determine exactly how many hours you could run the MaxxFan Deluxe Roof Vent # MA00-06401K from your Sprinter's battery with the engine turned off, as various factors such as the battery's condition, type, and charge state will affect how long the fan could run before depleting it. The MaxxFan Vent will only draw 5 amps at 12V but I don't recommend leaving it running for longer periods of time from the Sprinter's battery without the alternator providing a charge....
    view full answer...

  • How to Power Interior Lights of an Enclosed Trailer
  • The best way for you to power the interior lights of your enclosed trailer is with a mounted 12V battery. To do this, mount the battery with a battery box like # TLA7708R and use a junction box # 38656 to tap into your 7-way. You will also need ring terminals # 44-5310A, and wire # 12-1-1 to run to each light. You will also want a light switch such as the Pollak rocker switch # PK34308 or toggle switch # PK34571. You will be able to charge the battery when the 7-way is attached to your...
    view full answer...

  • Adding a Battery to a Trailer with a 4-Way Connector
  • To run a charge line to your battery you will first need to install a 7-Way on your trailer. This can be done using the Epicord 7-Way Molded Trailer Plug with Junction Box # 277-000141. The Black wire in the junction box is the one that will carry the 12V power. Just simply use a ring terminal like part # 44-5310A and run 10 Gauge Wire # 10-1-1 to the positive terminal on your battery. The 4 wires that are currently on your trailer and tow vehicle are only for the lights and are not...
    view full answer...

  • Solar Charging System for RV with 6V and 12V Batteries
  • In order to have multiple solar panels provide trickle re-charging to an array of RV batteries you need to have a controller that can manage the output from the panels. My contact at Go Power! said that most 100 watt solar panels output 20 volts and this is simply to much for 12V and 6V batteries even if multiple ones are wired together. A controller like # 34280503 is essential for ensuring the panels' output is stepped down to the appropriate voltage/current to prevent overcharging. I...
    view full answer...

  • Add Battery/12V System To Existing 120V System In Pop Up Trailer
  • For the application that you are attempting, you will need to install a battery and wire the trailer to run off that battery instead of running off the shore power at a campsite. If all of your trailer lights and appliances run off of 120V then the 12 volt battery is not going to power them. you will need to add 12 volt accessories and lights to the trailer. If the trailer currently uses a converter from the shore power and the accessories and lighting run on 12 volts then you can run them...
    view full answer...

  • Toubleshooting Non-Functioning Lippert 3500-lb Tongue Jack
  • Based on your description of the problem it sounds like either your jack has a bad ground connection or that the battery is not charged up quite fully enough to operate the jack motor. If the jack's ground connection is made by its mounting plate, as is often the case with an a-frame tongue jack like # EJ-3520-BBX, you can try sanding/cleaning the mating jack and trailer surfaces to remove paint, primer, rust or trapped dirt that could interfere with the ground connection. Ideally you...
    view full answer...

  • Availability of an Electric A-Frame Jack for a 24 Foot Cargo Trailer
  • The Etrailer Electric A-Frame Jack, # EJ-3520-BBX, would work well for your enclosed trailer. When looking for an electric jack for a trailer you will want to find a jack that will handle the trailer's tongue weight. Typically, the tongue weight of a trailer will be 10 - 15 percent of the gross trailer weight. So, if your trailer's gross weight is 10,000 lbs, then the tongue weight will be 1,000 - 1,500 lbs. The best way to power an A-frame jack is to have a battery installed on...
    view full answer...

  • Can Batteries be Run in Parallel and Used With Converter Box
  • You can absolutely run two 12 volt batteries in parallel and use them with your converter box. Running batteries in parallel will maintain their 12 volt output but they will just have a higher capacity to be run for a longer time. If you take a look at the accompanying diagram you can see exactly how to wire the batteries. A battery charger will still be needed to charge your batteries and the CTEK MULTI US 3300 12-Volt Universal Battery Charger w/ Pulse Maintenance # CTEK56158 is a...
    view full answer...

  • Electric Trailer Jack and Landing Gear Recommendations for 3 Different Trailers
  • It sounds like you have 3 heavy trailers! For the first two trailers I recommend using a landing gear set such as # UF17-943010 rated for 12,000 pounds total. Each jack has its own motor so they can be raised and lowered independently of each other which is great for keep the trailer level. For the third trailer I recommend the Husky Brute # HT87247 which is rated for 4,500 pounds. Since the jack will be mounted towards the front of the trailer it will not have to handle the total weight...
    view full answer...

  • Water Tank Heaters for Well Insulated 30 Gallon Tanks on a 2017 Ford E450 Box Van
  • ThermaHeat RV Holding Tank Heater Pad # 277-000164 or any of the others needs to be in direct contact with the tank so you would need to clear away anything that is in the way of making that direct contact. Given the amount of insulation you have you would most likely be fine with a smaller pad such as # 277-000163 which is longer at 25 inches but narrower at 7-1/4 inches. But considering what you will be doing I strongly recommend having a spare battery with you as well as an AC charger...
    view full answer...

  • Can a Battery for an Electric Winch be Mounted Inside an Enclosed Trailer
  • You can put a battery inside the trailer but you would want to place it in a box of some kind since batteries have gases and chemicals in them. We have different battery boxes depending on the size you will need. I have included a link to them for you. You can run a wire to get a maintenance charge via the 12 volt circuit in the trailer wiring. However, it will not charge up the battery. The wiring is too small and most vehicle alternators are not strong enough to push back the amperage...
    view full answer...

  • Trailer Hitch, Brake Controller, And Wiring Recommendation For 2014 GMC Savana Van With No Tow Pkg
  • I will start with the trailer hitch for your 2014 Savana. From my research I found the Savana can tow a trailer up to 10,000 lbs. The trailer hitch I recommend is the Draw-Tite Ultra Frame Trailer Hitch Receiver, part # 41946. This is a Class V hitch and has a 2 inch receiver opening. You might be interested in etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop and one with a 2-3/4 inch rise or 4 inch drop. It also includes a 1-7/8...
    view full answer...

  • How to Power Winch at Rear of 2017 Chevy Silverado
  • What you would normally do for a front-mounted winch is use an auxiliary battery and Isolator # TR118665 between your Silverado's battery and the aux battery but the issue, as you mentioned, is the distance to the rear of your truck. The best option then is going to be using a battery box mounted on your truck and wired to your winch. You should use the TorkLift PowerArmor Single Locking Battery Box # TLA7720R because it has an access hole for wiring and locks to keep your battery protected. Using...
    view full answer...

  • Can a Trailer Mounted Battery be Charged Up Using a Breakaway Battery Charger
  • A charger such as # 20011 will not be able to charge up a regular battery, only small breakaway batteries. The issue is that the wiring on the trailer and vehicle is not large enough and the alternator is not strong enough (on most vehicles) to push back the amperage required to charge up a battery. At best it can only maintain the charge level of the battery. Also, you will want to disconnect the breakaway battery from the larger battery. Otherwise it will just drain it and also shorten...
    view full answer...

  • Vehicle Trailer Socket to Provide 12V Trailer Power on 2010 Jeep Wrangler Unlimited
  • The Hopkins Endurance Quick-Install 7-Way Trailer Connector # HM42190 is a OEM replacement for the factory-installed 7-way on your 2010 Jeep Wrangler Unlimited. The linked photo shows you the rectangular connector that will plug in to the mating one on the vehicle as long as the Jeep had this feature from the factory. This RV-style blade pin 7-way socket carries lighting, trailer brake and 12V power signals for a trailer. You can refer to the linked article on trailer wiring for the...
    view full answer...

  • Recommended Trailer Battery Charging and Controller for 80 AH Battery
  • To run a charge wire from your tow vehicle to your trailer battery, you will want to use 10 gauge wire # 10-1-1 along with a 40 amp circuit breaker # 9510 and run that wire to your 1 o'clock trailer connection pin on your bumper connection. Then you will want to make sure your trailer 7-way also has a wire running to the trailer battery positive terminal that has a diode like the Roadmaster Single Park Light Diode # RM-690 to prevent back feeding power. This combination will give you...
    view full answer...

  • Can an Electric Trailer Jack be Powered from a 7-Way Trailer Connector
  • While you could possibly run the power from the 7-Way to the jack, it is not ideal and you could overload the circuit. I recommend adding a battery to the trailer and providing a maintenance charge to the battery from the 7-Way. You will connect the 12 volt circuit from the 7-Way trailer connector to the positive battery terminal. The jack will get its power from the trailer battery this way and not from the vehicle 7-Way. Having the wire to provide a maintenance charge will only maintain...
    view full answer...

  • Wiring Exterior Trailer Lights to be Powered by Reverse Circuit and On Board Battery
  • In order to wire your exterior hi-mount trailer lights so that they are powered by the reverse light circuit on your Ram but can also be powered by the on board battery, you will just need to use a diode like the Roadmaster # RM-790. The output side of the diode will go to your exterior LED lights, while the input side will go to the center pin on your 7-Way and also to your on board battery via a switch like # PK34308. I also recommend adding a circuit breaker like # 9506P before the battery....
    view full answer...

  • How to Power Enclosed Trailer Lights Off of 12V Battery
  • I can tell you exactly what you'll need to power your enclosed trailer's lights off of an independent 12V battery, though there isn't an adapter. You first need to mount the battery with a battery box for 12V batteries like # TLA7708R, and then use junction box # 38656 to tap into your trailer's 7-way. You will also need ring terminals # 44-5310A, and wire # 12-1-1 to run to each light, and to turn the lights on, a light switch such as the Pollak rocker switch # PK34308 or toggle...
    view full answer...

  • Troubleshooting Lippert Power Jack With Working Lights But Jack Wont Raise or Lower
  • If the fuse is good and the lights are working but you have to use the manual crank to raise/lower the Lippert Electric Trailer Jack # LC285318 then you either have a bad ground or a bad battery/battery needs to be recharged. This specific jack grounds through the frame so you will want to check to make sure that the plate and/or mounting hardware is connected to a clean/bare-metal surface as some paint can cause issues. If that looks good then you will want to take your 12V battery...
    view full answer...

  • Charge Current of Tekonsha Two Stage 12 V DC Battery Charger
  • The Tekonsha Two Stage 12V DC Battery Charger # 2024-07 has a maximum charge current of 1.2 amps and is designed to charge breakaway batteries. Instead you may want to look into a battery charger such as the CTEK # CTEK56158 which has a maximum charge current of 3.3 amps for your accessories but you will need to use a dedicated battery for your breakaway such as the Hopkins Engager Push-To-Test Trailer Breakaway Kit w/ Built-In Charger # 20099.
    view full answer...


Do you have a question about this Battery Charger?




  • Why etrailer.com?

    At etrailer.com we guarantee:

  • Highest quality battery chargers for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate battery charger information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Satisfaction Guarantee
    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Test Fit:
Joe V
Expert Research:
Michael L
Video by:
Andrew K
Expert Research:
Patrick B
Expert Research:
Michael H
Installed by:
Jeff D
Expert Research:
Jameson C
Expert Research:
Adam R
Expert Research:
Rachael H
Expert Research:
Jeffrey L
Video Edited:
Chad S

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.


Product Experts Available Now!

Call 800-298-8924