Do not apply power to your Raspberry Pi 4 via the Type-C socket.
Please use high quality power supply, the low quality power supply will generate surge Voltage, which will damage the board chip. we recommend Panasonic brand NCR18650BD 18650 lithium battery.
Only the on-board switch is turned on to charge the 18650 battery if 【CHG】 pin is shorten, or the battery will be charged automatically after being powered on.
Be sure to power off & remove the 18650 battery then wait for 2 seconds when toggle charging mode
The X703 is a new design UPS board which is specially designed for Raspberry Pi 4 Model B only. It provides an advanced uninterruptible power supply and power. The X703 adds 4 test pins to achieve powered between X703 and Raspberry Pi 4 without additional cable.
Smart Uninterruptible Power Supply (UPS)
Supports 3A via Type-C socket fast charging
Add 4 test pins to achieve powered between X703 and Raspberry Pi 4 without additional cable.
Only work with single 18650 Lithium Ion battery
Integrated battery protection circuit
Integrated over current protection and over voltage protection
On-board 4 green LEDs indicate battery charging and discharging levels of 25%, 50% , 75% and 100%
On-board red LED show the status of battery charging or fully charged
On-board push button to control power on /off (Press-ON, Hold the button pressed at least 2s -OFF)
Allows power input via Type-C socket or XH2.54 connector
On-board 2-Pin PH2.0 connector allows to connect external power switch