Epoch 3500 mAh Unprotected Button Top 18650 Battery with USB Charging

Micro USB Rechargeable has built in USB port and circuit for charging Protected Cell No Type Button Top Capacity 3500 mAh Voltage 4.2 to 3.7 volts  Continuous Discharge 8A Dimensions 18.37mm  X  70.15mm Consumer Warning Warning: Unprotected Batteries are to only be used with devices that have their own Thermal Protection. Purchaser should understand the limitations of these batteries and assumes all risks of their usage.