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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.
@ThomasVikström
An anecdotal observation:
The battery in one of my Bangle 2 lasted 27 days until I charged it. It still had 9% left then so might have survived still a day. Pretty much default settings and apps. Bluetooth was on, wake on twitch on, BUT ~90-95% of the time it was lying idle on a table. Rest of the time I used it for gesture related activities and uploading/downloading data, relatively exhaustively. If I’d used it on my wrist all the time, the battery would most probably not have lasted that long.