This Lithium Ion battery is a great alternative to a standard lead acid battery at a 1/3rd the weight Get improved performance from this rigorously tested unit Rechargeable with high current, 90% recharge within 6 minutes More than 1000 cycles under JISD standard No acid inside, so no spill/leaks Contains no heavy metal, environmentally friendly State-of-the-art Lithium Ferrous Phosphate (LiFePO4) technology. BATTERY HJ12L-FPZ