Specification:
Product name:18650 USB Rechargeable Li-ion Battery
Model: 18650
Type: Lithium Battery
Appearance Capacity: 3800mAh/4200mAh
Voltage: 3.7V
Green Colour
Weight: 34g
Dimensions: 67 x 18 mm(length x body diameter)(without protected board)

Features:
Rechargeable USB 18650
Support for all power supply with USB charging
Close the lid is a 18650
When there is no electricity, open the cover inserted into the USB port èpossibile charge the battery directly

Package included:
1 x 18650 USB Rechargeable Li-ion Battery