My Bose SoundSport wireless earphones will charge to 100%, but when I turn them on they just constantly report the battery percentage through the voice. i.e. "Battery 100%, Battery100%, Battery 100%......and so on. This continues until they battery eventually runs out.
I'm having a similar issue. In my case when the 3arbufs aren't in use I get the message " Battery x%, connected to ..." Every 60 secs or so, as a result when I'm not using them the battery drains quickly.