Ultra 2 "open ring" charge stops at 77% instead of 80%

[SR 7]

Anyone else experience this? Is the battery damaged?

 

[Iwavvns]

Anyone else experience this? Is the battery damaged?

Keep in mind that the percentage is only an estimate and would likely change if you reboot the watch. From what I understand it is difficult to get an exact percentage from electrical pressure in batteries.

 

[Apple_Robert]

Anyone else experience this? Is the battery damaged?

Your battery isn't damaged.

About Optimized Battery Charging on Apple Watch - Apple Support

With Optimized Battery Charging, your Apple Watch learns from your daily charging habits to improve the lifespan of your battery. And supported Apple Watch models offer additional battery charge optimizations with Optimized Charge Limit.

support.apple.com

 

[chrfr]

I have a first generation ultra and its charge level when on the optimized level varies a little bit in the 75-80% range. It’s normal.