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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@HilmarSt
To increase the lifespan of a Li-Ion battery it should not be charged to 100% - I'm searching for a software controlled method to stop the charging process. This may only be possible if the charging circuit is inside the nRF SoC.
A more difficult way would be to stop the charging with a "Bluetooth Relay Module".