... CE, FCC certificate 4.high quality Rechargeable lithium polymer battery pack.3.7V850mAh 1700mA dischargeISO 9001 UL CE ... time.≥300min5.21C CapacityAfter standard charging, rest battery for 10min, then discharging at 1C to ... the Cells≥300 times5.4Capability of keeping electricity20±5°C, After standard charging, laying the battery 28days, ... Type For your choices Rechargeable lithium polymer battery pack