For someone with moderate loss who isn’t connected to a phone and does no streaming and just uses the automatic program in an average mix of sound environments, the Paradise rechargeables get about 30 hours.
Things that impact battery life:
-Severity of hearing loss/receiver strength
-Complex noise environments
-Streaming
-Age of phone and how it manages bluetooth
-Sitting in specialized programs all day (e.g. the speech in loud noise program drains the battery dramatically, AmpCROS programs, 360 program)
-CROS use
-plugged wax filters/dirty mics
-riding the edge of feedback all the time
The number one battery drain I’ve seen is from older phones that manage the bluetooth connection poorly. It’s easy to check whether this is your problem by just disconnecting the phone for a few days.
CROS users can expect a maximum of about 12 hours.
After that, heavy use of classic bluetooth phone streaming will suck down the battery life much faster than the proprietary accessories, but 8 hours a day of FM use will drain them pretty hard, too.
If none of these really apply and you’re just using the TV connector for 6 hours a day with otherwise minor battery draw, I’d send for repair.