1,Rechargeable Battery Pack with 4*18650 BP4836 2,Capacity:8800mAh 3,OutputVoltage:3.7V to 4.2V ... -ion Model: Rechargeable Battery Pack with 4*18650 FEREI | BP4836 Specifications of BP4836:Weight:235gCapacity: 8800mAhOutput Voltage: 3.7 to 4.2V ... Features of BP4836:* Professional lithium battery power pack , used for Bicycle Lamp B3 ...