12 Volt Battery Chargers

Shop 12 Volt Battery Chargers – Smart, Reliable Charging for Every Application

Find the perfect 12V battery charger for your needs at Battery Mart. Whether you're maintaining a small sealed lead acid battery, charging a motorcycle or ATV, or powering up large vehicle batteries in a professional garage, we have the right solution for you. We stock a wide selection of trusted brands like BatteryMINDer, NOCO, Battery Tender, and more—backed by manufacturer warranties and our commitment to quality.

Not sure which charger is right for your battery? Our team of battery experts is here to help! Contact us or call 1-800-405-2121 for personalized assistance. Shop our full selection below and get the power you need with a dependable 12 volt battery charger.

12 Volt Battery Chargers for Every Need

Shop reliable 12V battery chargers for cars, motorcycles, ATVs, and more. We carry top brands like BatteryMINDer, NOCO, and Battery Tender, all backed by warranty and expert support.

Need help? Call 1-800-405-2121 or email us — our battery experts are ready to assist!

Frequently Asked Questions about Battery Chargers

How can I tell if my battery is charged or not?
The simplest method is to test your battery with a voltmeter to measure the voltage between the positive and negative terminals or posts. While the battery is not being charged and not powering anything, you can use your voltmeter and get a reading. For a 12-volt lead-acid battery, the voltage should be between 11 and 13 volts. The closer it is to 13 volts, the closer it is to being fully charged. If it's closer to 11 volts, the battery needs recharged. The exact voltage will differ depending on the battery voltage, style, and age.

How long will it take to charge my battery?
There's no definitive answer to this question, but you can make a pretty good guess with some simple math.

(Battery Capacity) / (Charger Amps) = Hours

Our ETX-30L Big Crank battery has a capacity of 26 Ah. You plan on charging this with a 2 amp charger. Using the above equation, you would have [26 Ah / 2 Amp = 13 Hours]. This is a rough estimate and usually tells us how long it will take to recharge the battery to about 80% of its capacity.

To complete the recharge all the way to 100%, it will probably take an equal amount of time to recharge the last 20% of capacity. Some chargers may get it there a little faster, but there's no absolute guarantee.