SunFounder Lithium Battery Pack Expansion Board Power Supply with Switch for Raspberry Pi 3 Model B, 2 Model B and 1 Model B+ Banana Pi 3800mAh 5V/1.8A;

Introduction
The power module is designed for the Raspberry Pi 3 Model B specially, allowing the master board to work offline for up to 9 hours. It's not only supplying for Raspberry Pi; this board has 2 USB type-A ports - one supplies power for the Raspberry Pi and the other for the embedded LCD screen.
The module integrates a Li-ion battery charger IC, a boost management chip. And it is developed in strict accordance with the size of the international Raspberry Pi expansion board HAT, using only simple copper standoffs to install multi-layer Raspberry Pi boards.

For more information, please view at http://wiki.sunfounder.cc/index.php?title=Raspberry_Pi_Lithium_Battery_Power_Pack

Specifications
Battery capacity: 3800mAH
Maximum discharge current: 1.8A
No-load output voltage: 5.1V ± 0.1V
Standard charging current/voltage: 1.0A/5.0V
Cut-off voltage of fully charging the Li-ion battery: 4.18V - 4.2V

Package included:
1 x Lithium Battery Expansion board (with lithium battery)
4 x Copper standoff
4 x Screw
4 x Nut