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I have a ESP-WROOM-02 module with on-board 18650 battery. V+ and GND are exposed on the board.

Can I directly charge the battery using an USB-C connector with the two cables (red and black) directly soldered to the battery poles on the board?

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The lithium battery must be charged by a specialized CC/CV control chip. The module in question already has one, namely a TP5400, sitting between the mounted micro-USB connector and the 18650 battery holder. You should use the same USB connector for both programming the MCU and charging the battery.

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  • thanks for your answer! :) i was suppousing that wasn't possible to charge in that way! Thanks again!
    – Frank Piselli
    Commented Apr 29 at 10:29

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