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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
On yours I'd be pretty sure the solar cell gave out enough power or it'd never be able to charge the LiPo in any sensible time...
A normal Espruino board takes 110uA in deep sleep mode, and if it woke up every minute for quarter of a second and drew 35mA, that's about 250uA on average. That means that on your 10000mAh battery it should last over 4 years - so unless it takes that long to charge off a solar cell I'd say you're sorted :)