1.26650 flashlight 2.CE,ROHS,UL Approval 3.Use for bluetooth,game ... or PCM Item: 3.7v 4000mAh cells best for 26650 flashlight ModelLi-ion batteryStandard Voltage3.7VMax Charging Voltage(V)4.2Vlity ... specified in specification. 3.7v 4000mAh cells best for 26650 flashlight