Raspberry Pi Supply Module with 3800mAh Lithium Battery for Raspberry Pi 3 Pi 2 Model B Zero
Lithium Battery Expansion Board for Cellphone Raspberry Pi 3 Model B Pi 2B B+
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.
The working PMU (Power Manage Unit)can be only worked for charging mode or step-up mode at the same time.
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, two USB-A interface can maxmum output 1.8A current. The PMU itself has current-limiting protection. it will be short circuit when over 1.9A current.
You can charging this battery even if the switch is turn off.
Raspberry Pi main board is not included!!!
1 * V1.0 Lithium Battery Expansion Board
We Also Recommend
MakerFocus 4pcs 852540 3.7V 1000mAh Battery with JST1.25 Connector Lithium Rechargable Battery
1S LiPo Battery USB Charger 3.7V/4.20V 6 Channel 1S LiPo Charger Tiny Whoop Blade
TP4056 Charging Module with Battery Protection 18650 BMS 5V Micro USB 1A 186 50 Charging Board
MakerFocus Raspberry Pi Battery Pack UPS HAT Board with 4 LED Power Indicator(2600mAh Battery)