# BPI-M3  3.7 V lithium battery interface

**1,Battery interface of BPI series:**

![](/files/-M2HXHlF68nopjCNBSX5)

**2,The red wire of battery connects to the anode on the board, the black wire to the cathode on the board(Note: DCIN pins in the GPIO need 5.0V DC Input)**

![](/files/-M2HXHlHh3YCXwtv_Oft)

![](/files/-M2HXHlJsupfWWyHMGq8)

3,when plugging with lithium battery,the power LED is not on until you press the power-on button for several seconds, and then it boots up.

![](/files/-M2HXHlLtExVxTMm6pEl)

USB,OTG,DSI,CSI work fine when the board is powered by lithium battery.

4, The battery will be charged when DC power is connected.

![](/files/-M2HXHlNSZVXBf698rbA)


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