Overview:
This is a Power Pack including a power expansion Board and a 3.7V 2500mAh 9.25Wh Lithium Battery.
This pack is especially designed for Raspberry Pi, which enables to use the Raspberry Pi with a moveable power source.

Features:
- Two power supply modes: GPIO power output and USB power out;
- Support Raspberry pi or Android & Apple Phone or Pad or other electronic device charging;
- Supports charging while discharging, (it's stable output, the maximum output current can up to 1.8A while charging, but the chip heat will become larger. maybe you can place a external heatsilk on clip.)
- With 4 LED power indicator;
- Standard dimension of Raspberry Pi HAT;
- Removable battery, The external lithium battery requirements: 3.7V lithium battery;

- Built-in power path management, perfect support charging While discharging.
- Intelligent 3-stage charging (trickle, constant current, constant voltage), it can effectively extend the battery life.

- Maximum discharge current: 2A, Maximum charge current: 1.8A;
- Output protection: overcurrent, short circuit, undervoltage protection;
- Input protection: overvoltage, overcharge, undervoltage protection;

2500mAh Lithium Battery Specification:
- Battery Type: 854165 / 3.7V polymer lithium battery / rechargeable battery
- Nominal Voltage: 3.7V
- Full Charging Voltage: 4.2V
- Capacity: 2500mAh, 9.25Wh
- Size: 8.0mm x 40mm x 65mm