I have now had my Jabra Enhance Pro 20 HAs 8 days, and so far the daily performance of the rechargeable batteries has been great.
I have the HAs on daily for anywhere from 13 to 16 hours, and just before I place them into the charger, they typically each are still showing a remaining battery charge of 3 lights out of 5. On one day, they showed only 2 remaining lights out of 5. That day, I had more Bluetooth usage than the other days, using my iPhone.
Mind you, I am probably not using a lot of the battery power, because on a typical day, I spend only half an hour on the phone. On a day where I talk to one of our boys who lives across the continent, I might add an extra 20 to 40 minutes. I do NO TV streaming on the HAs, as the HAs do just fine picking up the sound from the TV’s speakers. And I do not stream music.
Still, the battery capacity seems to be just fine for my specific lifestyle.
Jim G