Some people like this (and similar apps), others not so much
https://forums.androidcentral.com/e...s/details?id=de.battery.widget&token=quuOMRHr
It does not
report the remaining life of the headset battery so much as it
estimates it based on usage since last charge/reset and known parameters of your particular headset.
I haven't used it and do not intend to. I use my Bluebuds X at the gym, about 75-90 minutes each weekday, and recharge them at some point over the weekend. That schedule works well for me; only once have I been forced to listen to my gym's crappy piped music because my headset went dead.