I got my bangle.js from the original Kickstarter campaign a couple of years ago (and even wrote an app for it). I've not used it for quite a while and now it seems, that the battery is dead: even when I charge for some time (>1h) the watch does not react on any of the buttons.
I found the video on opening the device (https://www.youtube.com/watch?v=GJHC925yti0
) and the type of the battery (3.7 V 280 mAh 502527) which was mentioned in the video description.
Unfortunately, the video does not show, how to replace the battery, so the question is: does anyone have replaced the battery already and could give some hints, how to do this?