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No, you must exclude the possibility that some third-party app is faulty first. I am a developer and I am sure you that some app causing ridiculous more power than it should. Unfortunately, there is no build-in method to let you know which app causing it. As Watch app in iPhone side only shows the duration and working time. However, if working time is almost the time as duration, there must be a faulty app or more.

If you are also a developer, you can connect your iPhone to your Mac. Using Xcode, you can read the logs, the system will log those apps who cause too much power. Then you can uninstall them.

I slightly disagree. There Has to be a process of elimination. Regardless, before you consider any third-party applications causing issues. First, I would conduct the battery diagnostic with Apple. Followed by determining how old is the watch and approximate usage it see's daily. If the Apple Watch is over two years and is used between 12 to 18 hours a day, it's likely nearing its battery life replacement as is. There are third-party applications that can be problematic, but you still have to factor the first steps before you eliminate any applications. Mainly narrowing what is contributing to the problem.
 
I slightly disagree. There Has to be a process of elimination. Regardless, before you consider any third-party applications causing issues. First, I would conduct the battery diagnostic with Apple. Followed by determining how old is the watch and approximate usage it see's daily. If the Apple Watch is over two years and is used between 12 to 18 hours a day, it's likely nearing its battery life replacement as is. There are third-party applications that can be problematic, but you still have to factor the first steps before you eliminate any applications. Mainly narrowing what is contributing to the problem.

I think you were off the topic. I and I thought the others as well, were talking about the policy of replacing the battery with a warranty, which was below 80% by Apple's rule. The question was whether Apple's measurement was reliable. Someone thought it was not, as his watch clearly couldn't work as long as expected and Apple said it was still over 80%. My answer was if you had faulty third-party apps on your watch. Even if you battery was good, you watch wouldn't still work that long. So there was a possibility that both Apple and the watch owner were correct.

You reply, for me, was talking about when is a better time to replace a battery. We didn't talk on it.
 
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The question was whether Apple's measurement was reliable. Someone thought it was not, as his watch clearly couldn't work as long as expected and Apple said it was still over 80%.

Again, there has to be a process of elimination. Apples battery diagnostic is nothing more than general measurement. It's not a guarantee of how healthy the battery is. Third party applications can certainly be a problem. But as noted before, half of the problem also might be the amount of usage the watch occurs. You can delete any third-party applications you want, but if the watch is nearing the end of the battery life depending on the usage, you're only delaying the inevitable.

The Issue with some third party Applications is that they are not fully optimized for the Apple Watch, which cause the battery life to deplete rather quickly.
 
Got my SS in July 15 and wearing it daily - great watch and still good battery life. No problems (yet;))
This is after 12 hours today.
View attachment 700005
I have an SS S0. 81% battery left with (checked now).

1 hour, 29 mins Usage and 13hours 50 mins standby.

Only app installed is Autosleep. Everything else is default.
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I slightly disagree. There Has to be a process of elimination. Regardless, before you consider any third-party applications causing issues. First, I would conduct the battery diagnostic with Apple. Followed by determining how old is the watch and approximate usage it see's daily. If the Apple Watch is over two years and is used between 12 to 18 hours a day, it's likely nearing its battery life replacement as is. There are third-party applications that can be problematic, but you still have to factor the first steps before you eliminate any applications. Mainly narrowing what is contributing to the problem.
Agreed.

Uninstall all apps and see how long the watch lasts.
 
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