Excessive battery drain with iOS 26 on iPhone 13 Pro Max

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Level 1

31 points

Excessive battery drain with iOS 26 on iPhone 13 Pro Max

I wonder if anybody else has observed similar battery drain on older iPhones with iOS 26? I have turned off all liquid glass features and it helped a bit but I still see my batter drain much higher than with the same usage on iOS 18. What really gets me is that during the night, when I'm a sleep, my phone loses 20% of its charge. I'm not even using it. I understand that after new OS install the batter usage will be higher for a day or tow due to indexing but this is now a week and it is still high.

Tom

Posted on Sep 22, 2025 2:35 AM

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Answer 1

MrBill3

Level 10

104,458 points

Sep 22, 2025 4:50 AM in response to pagzie

Hello

With any new version of iOS there are always maintenance and reindexing tasks to be performed. It should settle down in a few days.

1) Have you tried a restart? If not, do it now.

2) Go to Settings > Battery > BATTERY USAGE BY APP to see the apps that are consuming your battery.

3) Check “Battery Health” in the link:

iPhone Battery and Performance

Good luck.

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Answer 2

pagzie Author

Level 1

31 points

Sep 22, 2025 8:14 AM in response to MrBill3

Thanks for your reply. I'm aware of the reindexing and maintenance after major upgrade but I installed iOS 26 a week ago and I still see excessive drain on my battery. When I look at Settings > Battery > BATTERY USAGE BY APP I don't see any apps that would be using the battery. When I looked this morning after waking up and noticing 200% drop I did not see any app that registered any battery usage.

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