V9 expansion board supports 5V/3A or 3V/1A power output. Micro USB supports 1.5A charging current.
The mobile power supply has a built-in lithium battery protection IC with over-current, over-voltage, under-voltage and over-temperature protection.
Battery expansion boards are mainly used in mobile power or other battery-powered devices.
Pay attention to the positive and negative battery terminals when installing, which are clearly marked on the circuit board.
The normal operating voltage of the battery is 3.2V-4.2V, please do not connect the batteries in series, the series connection will increase the voltage. If you need to increase the capacity of the battery，you can connect in parallel, do not connect in series!
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