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CTEK US 0.8 Universal Battery Charger with Pulse Maintenance - Small 12-Volt Batteries

CTEK US 0.8 Universal Battery Charger with Pulse Maintenance - Small 12-Volt Batteries

Item # CTEK56865
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Battery Charger CTEK56865 - Charges/Maintains - CTEK Power Inc
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This powerful, all-weather, 6-step charger uses a patented pulse-maintenance system to charge and maintain 12V batteries. Designed to charge small batteries like those for motorcycles, snowmobiles, yard maintenance machines and trailer breakaway kits. Call 800-298-8924 to order CTEK Power Inc battery charger part number CTEK56865 or order online at etrailer.com. Free expert support on all CTEK Power Inc products. Guaranteed Lowest Price and Fastest Shipping for CTEK US 0.8 Universal Battery Charger with Pulse Maintenance - Small 12-Volt Batteries. Battery Charger reviews from real customers.
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  • Reviews (7)
  • Q & A (12)
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CTEK Power Inc Battery Charger - CTEK56865

  • Battery Charger
  • Lawn Mower
  • Motorcycle
  • Snowmobile
  • Trailer
  • CTEK Power Inc
  • 12V
  • Wall Outlet to Vehicle Battery
  • AC to DC
  • Charges/Maintains
  • 32 Ah

This powerful, all-weather, 6-step charger uses a patented pulse-maintenance system to charge and maintain 12V batteries. Designed to charge small batteries like those for motorcycles, snowmobiles, yard maintenance machines and trailer breakaway kits.


Features:

  • 6-Step fully automatic 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
  • 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, versatile 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 12V battery charger, 1 set of 16" battery cables with battery-terminal clips, 1 set of 16" battery 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 32 Ah
    • Maintains batteries with capacities up to 100 Ah
  • Charge cycle: 6-step, fully automatic charger with pulse maintenance
  • Input voltage: 110V AC - 120V AC
  • Charging voltage: 14.4V
  • Charging current: 0.8A
  • Dimensions: 5-1/2" long x 2" wide x 1-1/2" tall
  • 5-Year warranty


CTEK MULTI US 0.8 bulk charging time chart

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


CTEK MULTI US 0.8 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 0.8 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, 6-step process uses switch-mode, pulse-maintenance technology.


CTEK MULTI US 0.8 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. 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. 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.
  5. Float-maintenance stage maintains a constant voltage of 13.6V during the first 10 days.
  6. Pulse-maintenance stage begins 10 days after the battery is fully charged. 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. 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, ensuring a consistent charge. 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 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.


Keeps You Informed

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


CTEK US 0.8 indicator illustration

Additional Specs

  • Current: 0.3A 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


56-865 CTEK MULTI US 0.8 12V 6-Step, Pulse-Maintenance, Lead-Acid Battery Charger

Installation Details CTEK56865 Installation instructions




Customer Reviews

CTEK US 0.8 Universal Battery Charger with Pulse Maintenance - Small 12-Volt Batteries - CTEK56865

Average Customer Rating:  5.0 out of 5 stars   (7 Customer Reviews)

This powerful, all-weather, 6-step charger uses a patented pulse-maintenance system to charge and maintain 12V batteries. Designed to charge small batteries like those for motorcycles, snowmobiles, yard maintenance machines and trailer breakaway kits.

- CTEK56865
by:

Operates just as described with most any of the smaller batteries. I also think it would help keep a small car battery fresh while it is in storage but it would need a full charge first. Great product!!! 93351



- CTEK56865
by:

Arrived promptly. No issues! 463591


Comments
Still working great. Ready to purchase a second unit!
Jeff - 12/31/2018

48114

- CTEK56865
by:

I've had this charger for a year and it works great. I was able to attach one cable end permanently to a jetski battery and use the clips on the other cable end on my fishing boat electronics battery. The quick release built into the cable makes it easy to switch froom 1 craft to the other. Charges at a reasonable speed and shifts into battery maintenance automatically. Don't have to worry about quality when I buy from you guys. 730363



- CTEK56865
by:

Great charger! 640059



- CTEK56865
by:

Delivered in four days to Baltimore Maryland. J Leno recommend. This is my second one for second car. Keeps batteries top up, cars may sit for six weeks or more at a time between use. 327635


Comments
Used on 2002 2500 Avalanche, and 2017 Santa Fe Sport. Keep batteries at full charge.
Arthur - 12/27/2017

32306

- CTEK56865
by:

Product and service is excellent! 99555



- CTEK56865
by:

Great charger it is working right now on my lawn tractor battery. Just what I needed to keep my equiptment up and running. I also intend to use on my portable electric generator. 72720


7
7

Ask the Experts about this CTEK Power Inc Battery Charger

  • Trailer Battery Fuse Location on 2017 GMC Sierra Denali 3500
    I took a look at the online owner's manual for your 2017 GMC Sierra Denali 3500. I was able to find that there is a "trailer battery" fuse located in the number 2 position in the fuse block in the engine compartment, which is on the driver's side of the truck. I recommend verifying this information and taking a look at the fuse panel map in your copy of the owner's manual as well.
    view full answer...
  • Does Breakaway Pin of Trailer Brake System Being Pulled Damage Brakes of Trailer
    The only thing you would have to worry about if the breakaway pin of your trailer was pulled and the battery died is the battery. The trailer brakes and everything else are going to be totally fine. Just recharge the battery with a charger like the CTEK # CTEK56865 which was designed for smaller batteries like this and you'd be set.
    view full answer...
  • How Are Brake Magnets Affected if Breakaway Cable Has Been Pulled for an Extended Period of Time
    Breakaway Batteries are supposed to be able to send enough power to activate the trailer brakes for at least 15 minutes, but not for an extended period of time like 2 weeks. Your magnets are not hurt, but your battery is most likely dead. If you use a Battery Charger, like part # CTEK56865, then you might be able to coax your battery back to life. Even though just buying a new battery might be more cost-effective right now, in the long run it might be worthwhile to have a battery charger...
    view full answer...
  • Can Trailer Lights be Powered When Not Connected to Tow Vehicle
    You'd need to put a battery in your trailer so that you can power the trailer lights when you aren't connected to your tow vehicle. It would be a matter of just running a power wire from the battery to the lights. You'd need to charge the battery whenever you get a chance though like with a charger # CTEK56865. If you wanted a way to power the lights and charge the battery you can use the RV Charge Panel part # PD4560K18LS8 which would plug into a wall outlet.
    view full answer...
  • Battery Charger for Replacement 12-Volt Battery for Curt Soft Trac I and II Trailer Breakaway Kits
    The best option for charging the Replacement 12-Volt Battery for Curt Soft Trac I and II Trailer Breakaway Kits # C52023 would be a charger like the CTEK charger part # CTEK56865 since the battery is a smaller one. I have this charger and use it for a motorcycle battery charger and it does a great job.
    view full answer...
  • Can Breakaway Battery of Trailer be Charged with Battery Charger
    Yes, a standard battery charger like the CTEK part # CTEK56865 can be used to charge the breakaway battery of your trailer when it's not in use.
    view full answer...
  • Can Trailer Connector On Truck Charge Trailer Breakaway Battery Once It Is Dead
    The current from the truck will not charge the battery in the Tekonsha Breakaway Kit, part # 20020 if the battery is completely dead. My contact at Tekonsha told me that it will charge the battery at a very low rate if the charger senses any charge on the battery. The charger in the 20020 will maintain a charge for the breakaway battery once it reaches its full charge. My recommendation is to use a battery charger like part # CTEK56865 to charge the battery when it is not being used....
    view full answer...
  • Troubleshooting Camper Breakaway Switch with Pin That Will Not Come Out
    I am glad you were able to safety return home after your camper's brakes locked up. It sounds like your breakaway switch could be corroded internally. That would explain why the pin would not come out. It is possible that same corrosion caused a short inside the switch that in turn caused the breakaway battery to apply the trailer brakes. We can help you with a complete new breakaway kit like # 50-85-315 or the Tekonsha unit you referenced, part # 20020. We also offer breakaway switches...
    view full answer...
  • Parts Needed to Install 7-Way Socket on 2011 Ford Ranger XLT with 4-Pole Connector
    For your vehicle to be able to send a 12V trickle charge back to your trailer's battery you will need a 7-way type installation which includes this power feed. You do not need a converter box for the truck, just a 7-way socket # 37185 and some additional wire and a circuit breaker. Your existing 4-pole will simply plug in to this 7-way. You'll then need to make only the one 12V power connection using 10-gauge wire like # 10-1-1 and circuit breaker # PK54540. Your trailer will need to...
    view full answer...
  • How To Tell if A Ford Explorer Has A Factory 7-Way and Recommended Brake Controller
    You are on the right track David. It looks like you have a factory tow package on your 2017 Ford Explorer since you have a 7-way and your owners manual mentions the fuse. Also the 7-Way and 4-Way on your truck are OEM factory part numbers so it has not been wired with an aftermarket plug. The brake controller would go in the Ford Explorer to activate the brakes on your trailer. All you need is the Tekonsha Prodigy P3 Trailer Brake Controller part # 90195 and the wiring adapter part #...
    view full answer...
  • Charging Battery for Trailer Lights Using Battery from 2017 Ford Super Duty
    To charge your batteries from an AC power source is pretty simple, you just need a charger like the CTEK US 0.8 Universal Battery Charger with Pulse Maintenance # CTEK56865. This is designed for smaller battery banks and just plugs in using a standard outlet like what you find in your home. To effectively charge your battery from your 2017 Ford F-250 is a little bit of a different story. A common misconception is that running a power wire from the vehicle battery to the trailer battery...
    view full answer...
  • Troubleshoot/Repair Damaged Trailer Break Away Braking System
    It looks like the interior of the switch was damaged. It's not a big deal assuming it's an electric breakaway system. You can just replace the switch assembly very affordably. The switches use two wires to connect, so they're not system specific. I like the switches offered by Fastway that use a coiled cable that won't drag and feature a carabiner that makes it simple to attach to the tow vehicle. The switches are available with a 4 foot cable as part # FA80-00-2040 or a 6 foot cable as...
    view full answer...

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Info for this part was:

Edited by:
Frances L
Written by:
Raymond P
Installed by:
Jeff D
Installed by:
Ryan G
Expert Research:
Jameson C
Expert Research:
Brandon M
Video by:
Joshua S
Video Edited:
Chris R

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