For developers or users wanting a custom "Battery Monitor" build, you can compile open-source projects using or Docker :
You can often find native battery info by dialing *#*#4636#*#* in your phone's dialer to access the "Testing" menu. Download Battery Monitor build apk
Apps like Battery Monitor by Glgjing or Cross-Device Battery Monitor are available on the Google Play Store for direct installation. For developers or users wanting a custom "Battery