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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.
@Gordon
Also, 2 batteries in one day?? I'm really surprised.
They're supposed to be 200mAh batteries at least, and usually even if you're doing a bunch of stuff with the microcontroller it'll only draw 4mA - so you'd hope to get 50 hours out of it.
If you turned the LEDs on the power draw would go right up, but still - it takes commitment to drain them so quickly :)