@user140458 if you're on version 2v13, install the latest settings from the development app loader at https://espruino.github.io/BangleApps/, put the Bangle on charge for a few ours so you're very sure it's full, then do Settings -> Utils -> Calibrate battery
The functionality's been available for a while but I only just added an easy option to the default settings app
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.
@user140458 if you're on version 2v13, install the latest settings from the development app loader at https://espruino.github.io/BangleApps/, put the Bangle on charge for a few ours so you're very sure it's full, then do
Settings -> Utils -> Calibrate battery
The functionality's been available for a while but I only just added an easy option to the default settings app