Specifications lithium ion battery 12v 1.smart BMS 2.excellent PCM with Japan Seico IC 3.LOGO is accept 4.Eco-friendly and safety Item name : multi-function portable vehicle jump starter lithium ion battery 12v lithium ion battery 12v detail specs as follows: Product Description lithium ion battery 12v 1Voltage12Vlithium ion battery 12v 2CapacityTypical:20Ah0.2C discharge after full charge.Min: 19.8Ah 3Charge Voltage12.6V±0.1Vlithium ion battery 12v 4Impedance 200mΩ(Max) 5Charging ModeC.C/C.V.Constant Current to Constant Voltage 6Charging Method Standard Charging 2A Fast Charging 2A http://www.puxunbattery.com/