Second generation lithium-ion battery delivers a heavyweight punch in a featherweight package. By combining the latest in lithium iron phosphate (LiFeP04) cell technology and an onboard cell management system, the BikeMaster® Lithium-Ion 2.0 Batteries provide unprecedented power and safety. Full function internal BMS (battery management system) provides individual cell voltage protection and cell balancing function. LiFePO4 cells provide power and safety in a non-combustible cell. Up to 70% lighter compared to lead-acid battery. Quicker recharge with 10A current and 90% charged within 6 minutes. Eco-friendly design does not contain any acid and heavy metals such as lead, cadmium, hydrargyrum (mercury). Detailed Specifications: O.E.M. parts: Replaces lead battery: BTX20H-BS, BTX20CH-BS, B50-N18A-A. Yuasa: N/A. Voltage: 12. Capacity: N/A.