Replacement Apple Watch Series 10 restarts, gets hot, and drains battery quickly

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Level 1

8 points

Replacement Apple Watch Series 10 restarts, gets hot, and drains battery quickly

I have an Apple Watch 10 that’s not even a year old and I started having problems with it rebooting, getting hot and the battery dies quickly. I reached out to Apple and after a diagnostic test it was determined that the problem was the watch and it needed to be replaced. I received a replacement apple watch last week and now the replacement watch is doing the exact same thing; getting hot, keeps restarting and the battery dies extremely fast. i can go from a fully charged watch to completely dead in an hour because of the constant restarts. i have removed all third party apps and only the native apps remain on the watch. I didn’t have these issues before updating to OS26.

Is anyone else having this issue?

[Re-Titled by Moderator]

Original Title: Watch constantly restarts itself

Posted on Nov 10, 2025 8:00 PM

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Answer 1

Top-ranking reply

Ingo2711

Level 10

80,175 points

Nov 10, 2025 11:05 PM in response to BPostell

You should contact Apple again and ask them to diagnose your replaced watch again.

Are you using the original USB cable that came with the watch and at least an 20W Apple power adapter?

Also try to erase the watch and set it up as a new device, without using the latest backup, to rule out defective data from the backup.

Unpair and erase your Apple Watch - Apple Support

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Answer 2

Ingo2711

Level 10

80,175 points

Nov 11, 2025 10:15 PM in response to jose_miguel28

In most cases erasing the watch and pairing it again to your iPhone will bring back the battery life to normal.

To be sure your backup data does not contain the issue, set it up as a new device first and test it.

You will only lose the watch faces you have created and might have to add the cards to your wallet again.

Unpair and erase your Apple Watch - Apple Support

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Answer 3

Ingo2711

Level 10

80,175 points

Nov 11, 2025 12:12 PM in response to BPostell

The power adapter is also made by Apple or at least certified to work with the Apple Watch?

Since the Series 10 supports fast charging, a power adapter having less than 20W will not charge the watch correctly.

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Answer 4

Ingo2711

Level 10

80,175 points

Nov 11, 2025 9:48 PM in response to jose_miguel28

You should contact the official Apple Support and ask them to diagnose your watch.

The can find out which apps or background processes are using up your battery life.

Contact Apple Support - Apple Support

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Answer 5

Ingo2711

Level 10

80,175 points

Nov 13, 2025 7:29 AM in response to BPostell

Can you visit an Authorised Apple Service Provider or Apple Store next to your place and show them your watch?

Apple - Find Locations

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Answer 6

Ingo2711

Level 10

80,175 points

Nov 11, 2025 10:30 PM in response to jose_miguel28

Did you also force restart your iPhone?

You should let Apple know directly about this issue by using the Feedback link, as this is the only way to reach them.

Feedback - Apple Watch - Apple

Feedback - iPhone - Apple

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Answer 7

Nov 11, 2025 7:54 PM in response to BPostell

I have the same problem as you, my S10 barely lasts 5-6 hours. My watch doesn’t get hot or reboot, but the battery drain is crazy. It mostly seems to be a software issue, since i’m not facing any problem with sensors or battery health.

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Answer 8

BPostell Author

Level 1

8 points

Nov 11, 2025 8:51 AM in response to Ingo2711

Thanks for responding. I’m using the charger that came with the watch. I’ve erased the watch twice and set it up as a new watch each time and it still does the same thing. I am going to give Apple a call and see if it is a glitch in the operating system.

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Answer 9

BPostell Author

Level 1

8 points

Nov 13, 2025 6:01 AM in response to jose_miguel28

I spoke with a tech yesterday and she ran a diagnostic test. The results showed that the watch is in great condition. That can’t be right when my watch was restarting the entire time I was on the phone with her.

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Answer 10

Nov 11, 2025 10:24 PM in response to Ingo2711

yep, I’ve tried that too and doesn’t seem to fix the issue :c

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Answer 11

Nov 11, 2025 10:06 PM in response to Ingo2711

really? I did contact them but they just ran a diagnostic and told me my battery health seems to be ok, they never said they can find which apps o background processes are using my battery life 🤔. I have been monitoring logs from my Apple Watch and trying to find out what it may mean with AI

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Answer 12

vkcjfc

Level 1

8 points

Dec 18, 2025 9:36 AM in response to BPostell

My watch series 10 has been getting hot and has left scaring on my wrist. I use the original apple charger. Reached out to Apple support and it took two days, after a diagnotics test and uploading photos of the watch and my wrist, for them to call back and tell me I have to bring it in. Have to wait for an appointment, no priority service. Have apple one and applecare. Watch is ony 6 months old. VERY DISSAPPOINTED WITH APPLE CUSTOMER SERVICE. I have been a apple watch user for years, this is my third watch.

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