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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.
@BogdanG
Li-Ion bateries (I mean for example those used in cellphones) are affected by self-discharging process (up to 2% per month). Of course it is much better than in older NiMH batteries but anyway we may get much more electricity than we expect after a few months.
Also battery age is important when we consider reusing of old phone batterry - the potential capacity might be also affected seriously.
Bogdan