What is the best car battery charger for your car or truck?  The best car battery charger should do more than just charge your battery.  It must also be fully automatic, be able to maintain the battery once it’s charged unattended without damaging the battery, charger, or your vehicle, and have some functions that actually improve the health and performance of your battery.

Best Car Battery Charger CTEK 93-56-864 MUS 4.3 12V Battery Charger Kit ViewMore and more battery chargers or battery tenders are incorporating smart microprocessors that control efficient charging programs that provide safe, effective charging along with intelligent battery maintenance.  To say it’s a difficult task to pick the best auto battery charger would be an understatement, but that’s actually good news for you.  It means that there are several great battery chargers out there that will meet your needs.

If we’re going to pick just one best car battery charger, what kinds of features should it have?

Trusted Brand

It’s true that there are lots of smart car battery chargers available, but some are new from unknown brands.  The problem is poor support after the sale.  If you have to go to a Chinese website trying to find a contact form or email in order to get support for a failed portable car battery charger, you’ve probably made the wrong choice.  The best car battery charger will come from a trusted brand.

Brands like CTEK, NOCO Genius, Schumacher, Battery Tender, Optimate, Black & Decker, and Optima not only produce reliable battery chargers, they support you after the sale.






Smart Chargers

Many modern car battery chargers have built-in microprocessors that control multi-step charging programs that not only charge your vehicle’s battery, but also condition and maintain it delivering longer battery life and better performance.  The best car battery charger is an intelligent, computer-controlled battery charger.


Interested in see other popular car battery chargers with great features?  Be sure and see our other articles about some of the best!


Fully Automatic

Manual car battery chargers have the disadvantage of not being fully automatic.  That means that they must be monitored and don’t have the capability to maintain your battery unattended for any period of time.

The best car battery charger is fully automatic with a built-in computer that controls charging and maintenance fully unattended.  Modern smart battery chargers and maintainers can be left connected indefinitely to your battery without fear of damage to the charger, the battery, or your vehicle.


Best Car Battery Charger CTEK 93-56-864 MUS 4.3 12V Battery Charger Charging Grid


Battery Health

Lead acid batteries have lead plates inside that over time become sulfated and less efficient.  If not addressed, sulphation can lead to a dead battery that can no longer be recharged.

The best 12V battery charger will have a built-in step in its charging program that can desulphate your battery improving its efficiency and prolonging its useful life.

Rugged Durable Design

The best car battery charger should be able to stand up to harsh environments.  It should be rugged, shockproof, weatherproof if not waterproof, dustproof and capable of operating in extreme temperature conditions including both very hot, humid environments and cold weather environments alike.


When a manufacturer provides a longer warranty, they are telling you that they have more faith in their materials and workmanship than other brands.  You should expect at least a 1-Year warranty with any battery charger you buy.  The best car battery charger will offer a warranty over 3 years.





We searched battery forums, automotive forums, social media, manufacturer sites, consumer sites, retail sites, and customer review sites to find the most popular, highly-rated, best car battery charger.


Take a look at our choice and see if it’s the best car battery charger for your needs!


CTEK (51-864) MUS 4.3 12 Volt Fully Automatic 8 Step Battery Charger

Best Car Battery Charger CTEK 93-56-864 MUS 4.3 12V Battery Charger Main ViewAlmost twenty years ago, a Swedish company known as CTEK AB invented the modern consumer automotive smart battery charger.  Today, CTEK battery chargers are the choice of auto enthusiasts everywhere and many premium auto manufacturers like BMW, Corvette, Ferrari, and Lamborghini who actually sell them under their own brands. The CTEK 56-864 MUS 4.3 12-Volt Fully Automatic 8-Step Battery Charger is one of CTEK’s most popular and highly-rated car battery chargers because of its intelligent microprocessor and patented defulfation process that can improve the health and prolong the life of your battery.  It has other unique capabilities that set it apart from more basic car battery chargers including  the ability to diagnose and determine if your battery can receive and retain a charge, a built-in reconditioning mode that can actually revive a stratified or deeply discharged battery, and a cold weather mode that optimizes charging during cold winter days.  Here’s what you need to know.

Best Car Battery Charger: Features

  • 12V, 0.8 or 4.3-Amp smart, fully-automatic, rugged battery charger and maintainer with a microprocessor-controlled, multi-step charging program that charges your battery faster, improves it performance, and prolongs its useful life
  • Designed for a variety of vehicle battery types and chemistries including wet/flooded, calcium, gel-cel, and latest Start-Stop AGM
  • Capable of desulfating, charging, reconditioning, and maintaining your car, truck, or other vehicle battery
  • Best Car Battery Charger CTEK 93-56-864 MUS 4.3 12V Battery Charger Kit ViewProven to extend your battery’s life by up to 3X, CTEK chargers use their patented 8-step charging program to solve a variety of battery problems
  • Rugged design incorporates protection against shock, weather, dust, and moisture and is capable of operating in extreme temperature conditions from -4 to 122 degrees F
  • It has the capability to increase your battery’s useful life with its patented desulfation process that removes sulfate from lead plates
  • Your vehicle electronics are safer thanks to CTEK’s very clean voltage and current that can remain connected to your battery indefinitely without fear of damage to your battery, charger, or vehicle
  • Many stratified and deeply discharged batteries that won’t accept a charge can be restored by this charger using its unique reconditioning function
  • Cold weather mode optimizes charging during cold winter days
  • Perfect for AGM batteries like Optima models
  • Stay informed using its built-in LED display that tracks the charging process
  • Safety features include non-sparking connections, short-circuit protection, reverse polarity protection, and over-charge protection including error lights
  • 5-Year limited warranty


  • 1 – Comfort Connect clamp
  • 1 – Comfort Connect M6 eyelet
  • 1 – Storage bag


Customer Reviews

See CTEK (51-864) MUS 4.3 12 Volt Fully Automatic 8 Step Battery Charger Customer Reviews >>>







Best Car Battery Charger Comparison




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