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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.
@WizardStan
I usually let it charge for a few hours, yeah, even left it overnight once with the same effect, 4.5 days and it was down to 15%. I'll start making specific note of how long I leave it charging, for science. Probably just charge it overnight, just to be sure.
It's funny you mention making it more linear because I remember that happening. Used to be I'd hit 20% and it'D be dead in a few hours if I didn't plug it in. I forget when or how but I distinctly remember being pleased that I didn't have to treat 20% as effectively empty anymore. So that must've been 2v12 or earlier. Certainly more than a year a go which is as far back as gadgetbtidge seems to keep a record. But you can see in the before graph I posted it's pretty linear even at 20%, with only a slight knee at 80% whereas the after (which posted before the before, alphabetical I assume) had a very distinct knee at 80%.
Anywho, now that I'm functional back on 2v12 I'm going to keep running some experiments, let it run for a few days, see how long it takes to go from 45 to 15, charge it back up, see how long it lasts, then back to v24 I guess and see what happens when I let the battery level drop to zero. Probably take me a month.