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MakerHawk Raspberry Pi 5 Port USB 2.0 Hub Power Supply Module with 3800mAh Lithium Battery for Rpi 3 Pi 2 Model B A+ Pi Zero

by MakerHawk

Lithium Battery Expansion Board for Cellphone Raspberry Pi 3 Model B Pi 2B B+

Feature:
Battery capacity: 3800mAH Maximum
output current: 1.8A
Output voltage: 5.1V ± 0.1V
Double USB output
Standard charging current / voltage: 1.0A/5.0V
It can last about 9 hours if only pi 3.
The Lithium battery expansion board can be also used on cellphone.

Description:If the USB-A interface without any external load (like Pi), with 5V input voltage of MicroUSB, then the PMU enter charging mode. The PMU will integrate a current-limiting resistor with the external voltage, 5V voltage for Lithium battery, around 4.6V-4.7V voltage for USB-A interface.(The "ON" LED lights )
The PMU would enter step-up mode without external 5V voltage. Under this circumstance, turn on the switch, USB-A interface can output maxmum 5V voltage