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,* Do not apply power to your Raspberry Pi 4 via the Type-C socket of Raspberry Pi 4.
* 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.
* If 【CHG】 pin is OPEN, battery charging will be started after powering on(short press the on-board buttonto turn on) and stopped after powering off(press and hold for 2 seconds to turn off). If 【CHG】 pin is SHORT, the battery will be automatically charged once your power adapter connected.
* Be sure to power off & remove the 18650 battery then wait for 2 seconds when toggle charging mode