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Battery Chargers > Battery Charger > 8-Step Charger > 12 Volts > CTEK Power Inc


CTEK MULTI US 4.3 Universal 12-Volt Battery Charger with Pulse Maintenance and Small Battery Mode

CTEK Power Inc Battery Chargers

ratingratingratingratingrating (15 reviews)


Code:   CTEK56864

Retail:$84.99

Price:$79.99


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CTEK Power Inc Battery Chargers - CTEK56864

This powerful, all-weather, 8-step charger uses a patented pulse-maintenance system to charge, maintain and help recondition 12V batteries. Includes a mode for small batteries. Sophisticated automatic charge cycle achieves the perfect charge.

Features:

  • 8-Step system constantly monitors and maintains 12V battery charge
    • Performs reliably and is virtually maintenance free
    • Won't overcharge or undercharge like typical trickle chargers
    • Switches automatically to pulse-maintenance phase when full charge has been reached
    • Reduces risk of overheating, sulfation and premature battery failure
    • Includes option to recondition stratified or highly discharged batteries
  • Highly versatile - offers (4) 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 charges and maintains batteries in cold weather
      • Recommended by many AGM battery manufacturers like Optima, Maxima and Odyssey
    • Recond (recondition) icon: higher current for reconditioning batteries that have been deeply discharged
  • Easy-to-use, quick-disconnect system features 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 design
    • Approved for indoor and outdoor use
    • Prevents reverse-polarity mistakes
  • Convenient accessories (sold separately) provide additional security and convenience
    • LED indicator battery cable lets you monitor your battery's charge at a glance
    • Additional battery-hookup cables simplify charging multiple vehicles
  • Includes charger, cables with battery-terminal clips, cables with M6 (6.4-mm) eyelet terminals, owner's manual and protective case


Specs:

  • Application: most starter and deep-cycle, 12V, lead-acid batteries
    • Includes wet, MF, AGM and most gel batteries
    • Charges batteries with capacities from 1.2 Ah to 110 Ah
    • Maintains batteries with capacities up to 160 Ah
  • Charge cycle: 8-step, fully automatic charger with pulse maintenance and Reconditioning Mode
  • Input voltage: 110V AC - 120V AC
  • Charging voltage:
    • Normal charge: 14.4V
    • Recondition mode: 15.8V
  • Charging current: 0.8A or 4.3A max
  • Dimensions: 6-1/2" long x 2-1/2" wide x 1-1/2" tall
  • 5-Year warranty


CTEK MULTI US 4.3 bulk charging time chart

This CTEK charger comes with two battery cables: one with clamp terminals and one with 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 4.3 Charger with 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 4.3 Charging Process

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. Safe, eight-step process uses switch-mode, pulse-maintenance technology.


CTEK MULTI US 4.3 charging process chart

  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 triggering 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 with a constant current of 1.5A and 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. During this stage, the charger maintains the battery at the optimum charge level of 95 percent to 100 percent. It recognizes any drop in voltage and sends a corresponding pulse of current to keep the battery properly charged. Pulse maintenance can be continued for months at a time.

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 designed with the most up-to-date technology to safely charge your battery. Using carefully monitored, low-grid voltage, CTEK's patented process differs from competitors' chargers by providing the precise final voltage that your battery needs to maintain the optimum charge level. This sophisticated, interactive device will never overcharge or undercharge your battery. You can leave it attached to the battery for months, making it perfect for seasonal vehicle storage.


Won't Cause Overcharging or Overheating

Overcharging can cause gassing, which can lead to acid concentration and corrosion of the battery's lead plates. It can also cause the battery cells to dry out ("boil dry"), which can allow the battery to overheat and 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 with 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 Using 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, but it also includes a desulfating step that can often "revive" a lightly sulfated battery. It accomplishes this with carefully monitored electronic pulses of energy that help to break down the lead sulfate crystals, allowing the battery to accept a charge once again.


Ensures Consistent Charging with Low Ripple-Wave Percentage

Ripple-wave percentage is the quantity of disturbances exhibited in current and voltage. CTEK's low-ripple design regulates the incoming current before passing it on to your battery, ensuring a consistent charge. Unlike an old-style charger, this CTEK charger maintains precise control over the output current, keeping a battery healthier, more productive and longer lasting.


Protects the Vehicle and Its Electronics

The charger is also safe for your vehicle. Its sophisticated circuitry is designed to be compatible with 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 with 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. Because the Recond (reconditioning) mode uses a higher voltage than other charging modes, using it may cause water loss in batteries and possibly shorten the life of your electronics. Check with vehicle manufacturer and battery supplier for information.


Keeps You Informed

Indicators on the face of the charger light up to show the charging stage.


CTEK MULTI US 4.3 indicator diagram
CTEK MULTI US 4.3 function chart

Additional Specs

  • Current: 1.1A rms (at full charging current)
  • Back current drain: less than 1Ah per month
  • Ripple wave: less than 4 percent of rated current
  • Ambient temperature: -4 F to 122 F
    • Automatic reduction of power at increased ambient temperature


56-864 CTEK MUS 4.3 12-V 8-Step Universal, Pulse-Maintenance, Lead-Acid Battery Charger





Video of CTEK MULTI US 4.3 Universal 12-Volt Battery Charger with Pulse Maintenance and Small Battery Mode


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

Video review ctek 12 volt battery charger ctek56864
CTEK Universal 12-Volt Battery Charger Review

Video Transcript for CTEK Universal 12-Volt Battery Charger Review

All right. Today we're going to review part number CTEK56864 from CTEK. This is a CTEK multi US 4.3 universal 12-volt battery charger with pulse maintenance and small-battery mode. A few things to know about this charger is that it comes with a variety of accessories. First off it comes with the familiar pair of clamps that go to the top of the battery to charge the battery. It also has a permanent install port that you can install to your battery.

That simply just bolts on to your existing battery post, and you get an easy plug-in whenever you need it. The charger itself has an easy-to-use connection point that will plug into whichever way you attach to your battery. When you're not using it it also comes with it's own storage bag. First we'll go ahead and show you how the charger will be used in a conventional way. First off we'll go ahead and take our clamps and attach it to our car battery. Then we'll take the battery charger and plug it into the port.

Lastly we go ahead and plug the charger into the wall. Then we need to select a mode, whether it's for a motorcycle, a car, a deep-cycle battery, or a reconditioning. Once we have the proper mode selected, then there's an indicator bar on top that shows you the progress of the battery charger. When the series of LEDs is all lit, the battery charger and maintenance is complete. Now for a car that gets stored for a long time and you want a permanent connection to the battery for the charger, you can use the CTEK comfort connect eyelet. These eyelets will connect directly to the battery. We'll go ahead and install it to this battery to give you and idea of how it looks and how it works.

In this case we're just going to use a couple extra nuts to go to the post on our battery. Now each battery's going to be different. There may be a need for extra accessories to connect to your battery. Once we get this permanently installed we can go ahead and use the charger to maintain the battery over long periods of time. Also when we need to use the vehicle, we'll take the port for a charger, put the cap back on, and then just tuck it out of the way, and we're ready to go.

Also for short periods of time you could use the CTEK comfort connect clamp to maintain the battery. Clamps just basically clamp on to your battery terminals. You can maintain your battery that way. Now this charger is designed not only for cars, but other vehicles as well, such as ATVs, UTVs, anthign that has a battery that gets stored for a long period of time can benefit from the use of the CTEK battery charger. For an example, we'll go ahead and use it on a UTV. Our UTV has already been equipped with a CTEK battery health indicator with panel box. This has part number CTEK56380. All we need to do is go ahead and take our CTEK charger and plug into the side. This UTV can sit for as long as it's needed, and the battery will be protected and charged. We're now finished for the review of the CTEK multi US 4.3 Universal 12-volt battery charger. .




Customer Reviews

CTEK MULTI US 4.3 Universal 12-Volt Battery Charger with Pulse Maintenance and Small Battery Mode - CTEK56864

Average Customer Rating:  ratingratingratingratingrating4.9 out of 5 stars   (15 Customer Reviews)

This powerful, all-weather, 8-step charger uses a patented pulse-maintenance system to charge, maintain and help recondition 12V batteries. Includes a mode for small batteries. Sophisticated automatic charge cycle achieves the perfect charge.


- CTEK56864

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


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






- CTEK56864

ratingratingratingratingrating by: David04/08/2013


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






- CTEK56864

ratingratingratingratingrating by: Barney B05/24/2014


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






- CTEK56864

ratingratingratingratingrating by: A.J.09/18/2014


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






- CTEK56864

ratingratingratingratingrating by: Dan S.12/20/2013


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

ratingratingratingratingrating by: AD03/25/2013


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






- CTEK56864

ratingratingratingratingrating by: Ted C.11/28/2012


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






- CTEK56864

ratingratingratingratingrating by: R Hochnadel02/20/2014


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






- CTEK56158

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

Review from a similar CTEK Power Inc 12-Volt Universal Battery Charger


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

ratingratingratingratingrating by: Kevin12/26/2012

Review from a similar CTEK Power Inc 12-Volt Universal Battery Charger


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



- CTEK56353

ratingratingratingratingrating by: Todd06/07/2011

Review from a similar CTEK Power Inc 12-Volt Universal Battery Charger


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



- CTEK56158

ratingratingratingratingrating by: Martin M.09/29/2014

Review from a similar CTEK Power Inc 12-Volt Universal Battery Charger


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

ratingratingratingratingrating by: Joel B.06/30/2011

Review from a similar CTEK Power Inc 12-Volt Universal Battery Charger


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



- CTEK56158

ratingratingratingratingrating by: Robert LaBonte10/08/2013

Review from a similar CTEK Power Inc 12-Volt Universal Battery Charger


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



- CTEK56158

ratingratingratingratingrating by: Triple D Ranch07/22/2013

Review from a similar CTEK Power Inc 12-Volt Universal Battery Charger


thank's work's good 90944

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Ask the Experts about this CTEK Power Inc Battery Chargers
Expert Answers about CTEK MULTI US 4.3 Universal 12-Volt Battery Charger with Pulse Maintenance and Small Battery Mode - CTEK56864Do you have a question about this Battery Chargers?


  • Will The CTEK MUS 4.3 Battery Charger Charge a Deep Cycle Battery
  • Yes, the CTEK MUS 4.3 12-Volt Battery Charger, # CTEK56864, will charge deep cycle batteries. You may also be interested in the CTEK MULTI US 3300 Battery Charger, # CTEK56158. This charger will also charge deep cycle batteries, but does not come with the switch for small or larger batteries. I have attached a video of this charger for you to check out.
    view full answer...

  • Differences Between CTEK Battery Chargers # CTEK56864 and # CTEK56158
  • Both products are smart chargers, meaning that they adjust their charging current and voltage continuously depending on the condition of the battery being charged, rather than pump the same current continuously. Both automatically switch to pulse maintenance mode once a full charge is reached. I have included a manufacturer video that might be of interest and also one demonstrating one type of installation in a vehicle of part # CTEK56158. The CTEK Multi Universal Charger, part #...
    view full answer...

  • Battery Charger Option for a 2002 Corvette C5 Red Top Optima Battery and Deep Cycle Trailer Battery
  • After doing some research on the red top Optima Batteries for your 2002 C5 Corvette, the CTEK 0.8 Universal Battery Charger for Small 12 Volt Batteries # CTEK56865 will maintain a charge on your vehicle battery. This charger should also be able to maintain the charge on your deep cycle trailer battery as long as it has a capacity less than 100 amp hours. This charger can maintain batteries with capacities up to 100 amp hours, but will only charge batteries with capacities from 1.2 to 32...
    view full answer...

  • Trailer Wiring to Allow Trailer Battery to Charge from Tow Vehicle
  • The Hopkins 7-Way Molded Trailer Wire Connector # H20046 could be used to connect your trailer's battery to your tow vehicle by using just the black (+12V) and white (ground) wires. However, the wiring in a tow vehicle cannot really deliver enough amperage to charge a trailer battery. These +12V feeds are intended to maintain a charged battery, but not to charge a depleted one. Battery chargers such as the CTEK # CTEK56864 include several wiring harnesses one of which could be installed...
    view full answer...

  • Will Titan Brakerite EHB System # T4813100 Continue to Work if Connected to Dead Break-Away Battery
  • I spoke with my contact at Titan to confirm the operation of the Titan BrakeRite EHB Electric-Hydraulic Actuator for Disc Brakes System, # T4813100, and you are correct that if the BrakeRite is connected to a dead battery, it will bring the system down. In order to prevent this from happening, you will want to make sure that you are using a good battery and that you check it each time that you get on the road. We do not recommend trying to make a direct connection to the vehicle battery....
    view full answer...


Expert Answers about CTEK MULTI US 4.3 Universal 12-Volt Battery Charger with Pulse Maintenance and Small Battery Mode - CTEK56864Do you have a question about this Battery Chargers?



Info for this part was:


Test Fit:
Joe V

Edited by:
Frances L

Written by:
Raymond P

Expert Research:
Michael H

Expert Research:
Adam R

Video Edited:
Sue W

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