A lithium battery wants a lithium charger. Lead-acid chargers stop short of full, and their float and desulfation modes are hard on LiFePO4 cells. A true lithium battery charger fills the battery completely, then quits. Two numbers pick the right one: your battery’s voltage (12V or 24V on most rides, 36V or 48V on a golf cart) and an amp rating sized to its capacity, from a small charger for a motorcycle or a mower to a high-amp onboard unit for a boat or an RV.
Pick the voltage first.
Pick your battery’s voltage and size above. The answer shows up here, and the charger lights up in red below.
Rather talk it through? A real USA battery tech picks up at 888-274-7544, Mon-Fri 9a-6p EST.
Most chargers on garage walls were built for lead-acid chemistry: float stages that never end, trickle currents and desulfation pulses that keep a flooded battery alive. Lithium wants none of that. LiFePO4 charges fast, stops full and prefers to rest, so a proper lithium charger holds the right voltage (14.4 volts on a 12V battery, 28.8 on a 24V) and then actually stops. Every charger on this page charges on a LiFePO4 profile.
Picking one comes down to two numbers on the battery’s label. The voltage has to match exactly: a 12V charger for a 12V battery, a 24V charger for a 24V battery or two 12V batteries wired in series. The amp hours decide the amps. Hours to full from empty is roughly amp hours divided by amps, so a 100Ah battery takes about 10 hours on a 10-amp charger and about 5 on a 20-amp. Small starter batteries want small chargers; big house banks can take the big ones. Not sure? Call 888-274-7544 with the battery and we will match the charger before you order.
Not recommended, and with several brands we carry it voids the battery warranty outright. Lead-acid profiles undercharge lithium and desulfation modes can damage cells. Use a charger with a true lithium profile.
Match the voltage first, then the size. A 12V battery up to 25Ah takes the 12V 3A. From 40 to 200Ah, the 12V 10A, or the 12V 20A Onboard from 60Ah up. A 24V battery under 50Ah takes the 24V 5A, and a 24V bank of 50Ah and up takes the 24V 20A. A 36V trolling motor bank takes the 36V 8A, and a golf cart charger is matched to the cart and its plug. The charger finder above does it in two taps.
Roughly the battery’s amp hours divided by the charger’s amps, from empty. A 25Ah battery on a 3-amp charger is about 8 hours; a 100Ah battery is about 10 hours on a 10-amp charger and about 5 on a 20-amp.
