... FCC certificate 4.high quality Rechargeable lithium polymer battery pack.3.7V850mAh 1700mA dischargeISO 9001 UL CE MSDS ... ConditionCriteria5.10.2C CapacityAfter standard charging, rest battery for 10min,discharging at 0.2C to voltage ... time.≥300min5.21C CapacityAfter standard charging, rest battery for 10min, then discharging at 1C to voltage ... For your choices Rechargeable lithium polymer battery pack