watchOS 9.4 to Recalibrate Battery Capacity on 44mm Apple Watch Series 6
The watchOS 9.4 update that Apple is beta testing right now will include a battery recalibration process for the 44mm Apple Watch Series 6, Apple said today in an updated Apple Watch support document.

After updating to watchOS 9.4, the 44mm Apple Watch Series 6 will be able to estimate maximum battery capacity more accurately following the recalibration process.
Apple recalibrated the batteries of the Apple Watch Series 4 and Apple Watch Series 5 models with the watchOS 9 update, and now the process is being extended to the 44mm Apple Watch Series 6.
Battery recalibration has also been done for some iPhone models in the past, including the iPhone 11. Recalibration is able to improve inaccurate estimates of battery health that some users may be seeing.
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Top Rated Comments
Two other family members and a colleague with the same watch had better battery health, low 80’s, at the same time mine was in the mid 70’s.)
So I complained to Apple and they sent me a replacement.
I probably have my eye on a 2024 watch as thats the rumored big updates. So if this update doesn't make me feel better about my battery lasting long enough to make it until then...and it probably won't...I'll get a used S7/8 to hold me over. Probably at S9 launch as they'll be much cheaper. Probably an 8 if I wait until then.
my 6 series was stuck at 82% for over a year. that did not make any sense. i talked with apple and they said nothing was wrong and it was working fine. so there was no way to get it replaced under warranty.