The easiest to find battery percentage is probably to use the https://banglejs.com/apps/?id=widbatpc widget
I know but than i have to connect my device to pc/mobile which will ruin debuging process.
Even if it remove connection after installing app not a fact that following app is optimized enough to not have impact on final result.
@user140377 started
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.
The easiest to find battery percentage is probably to use the https://banglejs.com/apps/?id=widbatpc widget