I have had my series 3 (cellular) Apple Watch since ~December 2017.
It mostly does all I want it for. In the last couple weeks, I’ve noticed it shut down on four occasions. All late in the day. Twice whilst surfing, the other two times whilst on a 3km run (with AirPods and Apple Music) away from my phone.
I thought this was battery life, though before I went did my last run, I checked the battery and it was only a little under 50% charged. It lasted about 12 minutes before the watch shut down (approximately the same amount of time when on the previous run).
I checked the battery health, which is listed at 92%. I know being away from the paired phone drains the battery. But 12 minutes is a stretch (it lasts closer to an hour when surfing).
I was considering replacing the battery, though not sure how much difference this would make given 12 minutes when away from the phone.
Does anyone have experience with more recent models and battery life away from phone??