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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.
@jcmb
First of all: I'm using a F18, not an official Bangle.js but I was experiencing similar issues concerning the power consumption.
At first I thought it might be a problem with having built the image myself and fiddling with the interior (still might have been the issue...)
With the current cutting edge build (v6.78), I can also confirm that battery life has improved quite a lot over previous firmware updates.
Before battery life was two to three days at most. Now it's up to four days and still running.
Thanks! :)