An excellent Lithium battery with built in BMS, over voltage protection, reverse polarity and short circuit protection, fit and forget design, up to 5000 cycles. Powered by the latest and safest Lithium Iron phosphate technology (LiFeP04), this is a simple drop-in replacement to a lead battery that provides more than double the power, 10x the cycles, 10x the life, and at less than half the weight, with zero maintenance.