Product Review

Total Package:
2 * USB Rechargeable 18650 Battery
1*battery charger

Features:
3800mAh per battery
Only with an alive USB port, it can be charged more than 500 times
Can be recharged by battery charger as well
Suitable for all products powered by 18650 batteries
Lightweight and Durable
Fashion and Cool, Scientific
Awesome housing design
Green & Environmental

Note:
It need around 7 hours to be fully charged and pls not charge it too long while it will influenced the batteries' lives
It also can be charged by 18650 charger as normal 18650 batteries.
USB rechargeable batteries would be a little hotter when charging, this is normal.
The battery keeps in top condition within the temperature from -10?? to 40??.

Specifications
Input: USB port or 18650 charger
Output: 3.7V
Battery capacity: 3800mAh
Net weight: 35g
Size: 65*18 (mm)"