- Light and convenient to carry
- Easy installation and removal
- Protective and powerful
- Works as both an extended battery and a protection case
- Supports data synchronization and operating system version upgrade.
- Materials: imported PC,passed the international environmental certification, non-toxic, safe and reliable.
- Capacity: 4200mAh
- Input: DC 5V/1000mAh
- Output: DC 5V/1000mAh
- Working temperature: 0℃-45℃
- Cycle life: ≥500times
- Charging time: 4hours
- 1 x External battery case.