I assume it's Gadgetbridge, because the Bangle does report battery level every so often. Maybe the Bangle.js handler in Gadgetbridge needs to pass the updated battery values in somewhere to be logged
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.
I assume it's Gadgetbridge, because the Bangle does report battery level every so often. Maybe the Bangle.js handler in Gadgetbridge needs to pass the updated battery values in somewhere to be logged