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


8 reviews 
 

Shipping Weight: 1.9 pounds

Retail:$74.99

Price:$69.99


Battery Chargers > Battery Charger > Charges and Maintains Charge > 4-Step Charger > 12 Volts > CTEK Power Inc


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

CTEK Power Inc Battery Chargers

(8 reviews)


Code:   CTEK56158

Retail:$74.99

Price:$69.99


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Shipping Weight: 1.9 pounds

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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





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 Battery Charger Vendor Information

CTEK was founded in Sweden. Basically our parent company is a prototyping company. Prototypes everything from plastics to electronic equipment right down to batteries but we actually consider ourselves a battery company with out batteries. We know everything about them. How to make them last longer and perform better. We just deal with the charging and maintenance end of it. 00:18

We have a patented mode of charging for one thing that we go through. Ultimately what this is going to do is bring our battery up to charge and then shut off completely versus your traditional trickle mode or linear charge like others might do on the market. If you could actually see current and voltage what you would see with those traditional charges you are putting in the same current and voltage high amperage level. We actually consider those toasters a lot of times because they generate more heat than charge and ultimately can toast the battery if not used properly or left on too long. 00:45

We have a patented mode of charging for one thing that we go through. Ultimately what this is going to do is bring our battery up to charge and then shut off completely versus your traditional trickle mode or linear charge like others might do on the market. If you could actually see current and voltage what you would see with those traditional charges you are putting in the same current and voltage high amperage level. We actually consider those toasters a lot of times because they generate more heat than charge and ultimately can toast the battery if not used properly or left on too long. 00:45

We realize that nobody cares about their battery. It is an evil that nobody wants to see and unfortunately nobody cares about it until it is too late and there is a problem where your vehicle does not start or your batteries are discharged to the point where you need to replace them. With our add on series, the comfort indicator, we have simply made your battery visible now. It is a one time installation. You bolt it directly to the battery with the flashing LED lights in there at all times visible you know where your battery stage of charge is at and if you need to charge it. Everything about our charger is we try to make it really safe, easy to use, and very functional. That is part of the quick connect and comfort indicator series that we have launched. Basically the concept behind it is you can have your one time installation on the battery especially with the comfort indicator series with the LED lights in it, now your battery is actually visible. You know at all times when you need to charge your battery and then it is pretty easy to use basically and you can balance your charger from vehicle to vehicle as you need to charge. 02:07

We like to think we have the best charger on the market. We try to stay ahead of the curve with the technology that we are putting into the battery chargers. CTEKs all are back by five year no questions asked warranty. Every household needs one of these chargers. It is a very robust design and it absolutely works on everything. From your lawn tractor, your boat, your RV, your motorcycle, your sports car. It is a very indispensable product to have.




Customer Reviews

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

Average Customer Rating:  4.9 out of 5 stars   (8 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: Bob B. - etrailer.com Employee11/14/2013


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: Kevin12/26/2012


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: Calvin M.01/24/2015


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: Martin M.09/29/2014


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: Isaac D.12/23/2014


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: Joel B.06/30/2011


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






- CTEK56158

by: Robert LaBonte10/08/2013


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






- CTEK56158

by: Triple D Ranch07/22/2013


thank's work's good 90944




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


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  • You will want to use a circuit tester like the Quickee Tester, # 3808, and check the # 4 terminal on the back of the 7-way trailer connector on your trailer for power. This is the 12 volt power terminal so there should be power to that terminal. You will need to run a 10 gauge power wire like the, # 10-1-1, from the # 4 terminal (12 volt) on the 7-way trailer connector on the trailer to the positive terminal on the trailer battery. This will allow you to maintain a charge on your trailer...
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  • Adding a Battery and Wiring to a Non-Powered Trailer to Add Interior Lights to an Enclosed Trailer
  • The first thing you will need is a battery and a battery box. The wiring for the light will need to be connected directly to this battery via a switch that you can get at a hardware store if the light does not already have a switch. Or you can install a new light that has a switch like the Trailer Dome Light with Switch and Aluminum Base, # IL61CB. Mount the switch in the trailer, route the wiring from the light to the switch, and then from the switch to the battery. If the light is...
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  • Can a 7-Way Trailer Connector Be Used To Charge the Trailer Battery
  • The 12 Volt auxiliary terminal on your 7-way connector can be used to keep the battery on your trailer charged. You will need to run a 10 gauge power wire like # 10-1-1 from the 12 volt auxiliary terminal on the 7-Way trailer connector on the trailer to the positive terminal on the trailer battery and ground the negative terminal of the trailer battery to the trailer frame. This will allow you to maintain a charge on your trailer battery, it will not charge the battery from a discharged...
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  • How To Charge Trailer Battery From a Chevrolet Silverado With a 7-Way Connector
  • To keep the trailer battery charged you will need to run a 10 gauge power wire like the, part # 10-1-1, from the 12 volt power pin (# 4 terminal at 11:00 position) on your trailers 7-way connector, to the positive terminal on the trailer battery. Now when the trailer is connected and you are towing, the tow vehicle will provide a maintenance charge to the trailer battery. It will not charge the battery from a discharged state. You will want to test the # 4 terminal at the 1:00 position...
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  • Charging a Trailer Breakaway System Battery Using the 12 Volt Circuit on a 7-Way Connector
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  • Installing a Battery on a Trailer and Wiring it to Run Interior Trailer Lights
  • I recommend a 12 volt car battery rather than a breakaway battery because you may end up needing the larger battery down the road. What you will do is attach a battery box (see link for options) to the trailer frame. From the trailer side 7-Way connector, there will be a wire attached to the pin in the 11:00 position (if looking at the face of the plug). This is the 12 volt circuit. You can attach that to the positive terminal of the battery. It will maintain the battery but it will...
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  • 12 Volt DC Battery Charger Recommendation for Charging an Auxiliary Battery with a Truck
  • This Tekonsha Two Stage 12 V DC Battery Charger, part # 2024-07, is designed to charge 12 volt systems while being used on a 12 volt power source like your truck has. However, the # 2024-07 is designed for maintaining smaller batteries that go through extended periods of not being used. It is not designed to charge a larger vehicle battery like the one you have in your truck. I would recommend you use a CTEK MULTI US 3300 12-Volt Universal Battery Charger w/ Pulse Maintenance, part...
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  • Recommended 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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  • 2006 GMC Sierra Trailer Wiring Not Supplying Battery Charge on a 2005 Slide in Camper by Six Pac
  • If you have a 7-Way connector on the rear of your 2006 GMC Sierra, the number 4 contact, in the 1 o-clock position, looking inside the connector from the rear of the vehicle, should be the 12 volt hot wire contact (see link). Check this contact with a circuit tester, item # 3808 if needed. If you do not have power to this contact then you will need to determine if there is a blown fuse. This fuse is under the hood in the power distribution box (see link). There should be a 40 amp fuse in...
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  • Battery Charger for a Trailer Battery on a Dump Trailer
  • For your larger battery, I do recommend the CTEK MULTI US 3300 12-Volt Universal Battery Charger, part # CTEK56158. This charger is designed for larger batteries like the one on your trailer. This being said, you could also use the 12-volt accessory circuit on your 7-way trailer connector to maintain the battery on your trailer. Be sure to follow any battery manufacturer instructions regarding battery charging.
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  • How to Charge, Maintain and Wire a Winch Battery, Wiring Front of Truck to Trailer
  • Running a charge line from a vehicle charging system for charging a trailer mounted battery can be accomplished but the vehicle charging system does not have enough power to charge a battery that distance away from a discharged state. The charge line is only capable of maintaining a sufficiently charged battery while the vehicle is running. In your case you have two options. The easiest is to use a battery charger like the CTEK MULTI US 3300 12-Volt Universal Battery Charger w/ Pulse...
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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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  • Is it Safe to use a CTEK Battery Charger for Long Periods of Time on a Stored Vehicle
  • You should have no problem setting this battery charger and leaving it for months on end, unattended. The CTEK Battery Chargers work very differently than the old, traditional battery tenders. The old tenders used a trickle charge. Basically they constantly applied a little bit of power. This wastes electricity and can lead to some lead acid batteries overflowing, which is a big problem. The CTEKs do not trickle. Instead they detect that the battery has lost some charge. Then the...
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  • Installing 7-Way Connector on 2004 Ford Expedition with 4-Pole Trailer Connector
  • You are correct. That blue wire carries the output from the brake controller. To convert your 4-pole to a 7-way, use an adapter like part # 37185. The connector on the adapter would connect to your existing 4-pole. The remaining wires would connect as follows; the white wire would ground to the vehicle, the blue wire connects to the blue brake controller output wire and the black wire would be extended to attach to the positive battery terminal using an inline 40 amp circuit breaker like...
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  • How To Maintain Trailer-Mounted Winch Battery Using 12-Volt Accessory Feed
  • First, on the towing vehicle, you will need to install a battery isolator, # TR118665. The flow of current will go from the vehicle battery to the isolator. From the isolator it will go along a length of 12 gauge wire, # 12-1-1, to the vehicle side trailer connector via a 30 amp circuit breaker. Next, 12 gauge wire will need to run from the trailer side 7-Way to the positive Trailer battery terminal. If the winch came with a circuit breaker it will need to go between the winch and positive...
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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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  • 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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  • How to Wire Two Batteries In Series to Double Output Voltage
  • To wire two 6-volt batteries in series to produce 12-volts, you would connect the load to the positive terminal of battery # 1. Connect the negative terminal of battery # 1 to the positive terminal of battery # 2. Ground the negative terminal of battery # 2. I have produced a diagram showing the connections for you.
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  • Which Missing Fuse in 2005 Chevrolet Tahoe Will Power 12V Trailer Circuit to Charge Trailer Battery
  • Your 2005 Chevrolet Tahoe requires a 40-amp fuse be installed in the power distribution block under the hood. Please refer to the color photos in the linked article. These illustrate the location of the accessory fuse block in the engine compartment on the drivers-side. I have also provided a photo showing the location of the required 40-amp fuse (amber-colored in the photo). Installation of the fuse (and possibly a required wiring connection to the positive power post) will enable transfer...
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  • How to Power Trailer Taillights Without Being Connected to a Tow Vehicle.
  • The best option I can give you would be to bring with you a 12 volt car battery and run jumper wires from each of the circuits of the trailer connector to the positive side of the battery. Or you could use the # HM50928 in conjunction with the battery to allow you to easily control the power to each of the circuits. This would make things easier, but it is a costly option. To keep the battery charged you would need a battery charger like the part # CTEK56158.
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  • Running a 12 Volt Trailer Connection Circuit on a 2007 GMC Classic Body Style with a Diesel Engine
  • There is a power distribution box under the hood of the 2007 GMC Sierra that has two power posts that can be used for power to a brake controller and 12 volt power to the 7-Way RV connector at the rear of the vehicle. If your truck is equipped with a factory 7-Way and the 12 volt power circuit is not functioning you will need to check the 40 amp fuse nearest the forward most power post in the power distribution box. See photo at right. If you do not have a factory 7-Way on your vehicle...
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  • Can the 12 Volt Circuit in 7-Way Trailer Wiring Charge a Trailer Mounted Battery
  • First, when you connect the CTEK battery charger to the trailer battery you will need to ground it somewhere other than the battery negative post. It will need to ground to the trailer frame or another clean metal surface. The 7-Way wiring is not large enough and, most likely, the alternator on the vehicle is not strong enough to push back enough amperage to charge the trailer battery. The 7-Way wiring can provide a maintenance charge only to the battery. This will keep the battery at...
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  • Electric Trailer Jack Light Comes On but Motor Does Not Run
  • I do not think the fuse is blown because the light still comes on. It sounds like the motor has gone out. This could happen from over extending a jack or overloading it. If the jack is connected to a battery mounted on the trailer, the battery may not have enough juice to power on the motor but just the light. Take the battery off and have it tested. For a battery charger, use # CTEK56158. This charger works much better than a trickle charger and can revive a battery unless it is completely...
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  • How To Maintain Trailer-Mounted Winch Battery Using 7-Way 12-Volt Accessory Pin
  • I do not recommend using the accessory circuit if it is attached to the reverse lights as it will only provide power when the vehicle is in reverse. But you can connect the 12 volt accessory pin to the vehicle battery using the following method. First, on the towing vehicle, you will need to install a battery isolator, # TR118665. The flow of current will go from the vehicle battery to the isolator. From the isolator it will go along a length of 12 gauge wire, # 12-1-1, to the vehicle side...
    view full answer...

  • Best Way To Charge A Breakaway Battery and a Winch Battery
  • Using the breakaway battery charger to charge another battery on the trailer is not recommended. The larger battery you are using to operate the trailer winch would take an extremely long time to charge with a breakaway charger and would likely never charge fully with the limited amount of time the trailer is connected to the vehicle, even if towing long distances. The breakaway battery may not be charged sufficiently in this situation either. The best bet for charging the winch battery...
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  • Wiring a Battery, Power Inverter, and Charger on a 1980 Coleman Tent Trailer
  • First, the wiring from a trailer connector will provide a maintenance charge to a trailer battery, but will not up-charge it. If that is sufficient for your needs then you would have the trailer connector, trailer side, 12 volt circuit attached to your charger. The charger would then connect to the battery, and the inverter would connect to the battery. Bascially, you will have the 12 volt power wire go to the positive of the charger. Ground the charger to the trailer frame. The positive...
    view full answer...

  • No Power To 7-Way Vehicle Connector on 2008 Nissan Pathfinder After Tow Wiring Harness Installation
  • On your 2008 Nissan Pathfinder the Towing Relay 2 fuse is the brown relay, like the one included in kit # C57000.This relay will activate the 12-volt power circuit on the 7-Way connector. This relay is located in a fuse box under the hood, next to the vehicles battery. Next to the brown relay will be Towing Relay 1 (blue) which should be installed to activate the running lights and signal for the 4-pin towing harness. To charge a trailer battery from the 7-Way you should be using the...
    view full answer...

  • Can the Breakaway Battery Charger on a Car Hauler be used to Charge a Large Winch Battery
  • Using the breakaway battery charger to charge another battery on the trailer is not recommended. The larger battery you are using to operate the trailer winch would take an extremely long time to charge with a breakaway charger and would likely never charge fully with the limited amount of time the trailer is connected to the vehicle, even if towing long distances. The breakaway battery may not be charged sufficiently in this situation either. The best bet for charging the winch battery...
    view full answer...

  • How to Charge a Trailer Battery While Towing a Tear Drop Trailer with a 2002 Volvo v70XC
  • If your trailer has a 7-Way connector, then it either already has electric brakes or is set up for electric brakes. Either way, you would not want to use the pin and wiring for the electric brake to charge a battery because it is too small a gauge for this application. A 7-Way connector already has a pin for a 12 volt accessory. If you are looking at the face of the trailer side 7-Way, it is in the 11 oclock position. This wire is only large enough to maintain a battery but will not charge...
    view full answer...

  • 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....
    view full answer...


Do you have a question about this Battery Chargers?



Info for this part was:


Test Fit:
Joe V

Expert Research:
Michael L

Video by:
Andrew K

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