Fitbit Sense sudden drop in battery capacity

I suppose the inevitable end is near. The mandatory update (battery capacity downgrade) a couple of months ago took the battery capacity down to a little over two days. This weekend, I was surprised to wake up to a nearly dead watch after charging it the day before, but it's been consistent since then, using battery at about 6% an hour, or 17 hours total life. Now I'm going to be charging it twice a day.

I've tried rebooting it, no improvement. It's not getting warm like my previous one that failed and thankfully was replaced under warranty. I was swimming with it this weekend, but it's still working perfectly, just using more battery.

Not sure if I'll try replacing the battery as I see a recent post about that, or just be done with Fitbit. This is my third or fourth one, and they seem to be far more disposable than they should be.