Did the "critical" update last night and now battery power is dropping like a rock. Happened a few updates ago as well. That required an additional update to rectify the battery drain issue.
[Re-Titled by Moderator]
iPhone 6s, iOS 15
For the first 72 hours after an update while the phone is reindexing spotlight it will use more battery. If it persists after that go to Settings > Battery > Health and see what the percentage is. If it is 80% or lower you need a new battery.
I don't agree with this. If it's simply down to battery health (mine is 80%), then why did the issues arise once upgrading to IOS 15.7*? I was on IOS 14 before and the battery would last about 5 days! Now, it's draining within 12-16 hours.
Same here. My battery health is 80%, and all was fine until I upgraded to IOS 15.7*? I was on IOS 14 before and the battery would last about 5 days! Now, it's draining within 12-16 hours. And it will suddenly go down to 1%, then I do a soft or hard restart and it jumps up to 88% (on low power), and then I can literally watch it go down in 1-2% increments every few seconds. I have nothing running the background etc.
DJDools wrote:
I don't agree with this. If it's simply down to battery health (mine is 80%), then why did the issues arise once upgrading to IOS 15.7*? I was on IOS 14 before and the battery would last about 5 days! Now, it's draining within 12-16 hours.
An iPhone battery lasting 5 days is unbelievably unusual.
Do you have any deactivated SIM cards in your phone? I thought getting rid of it would drain the battery but instead it helped it. And why isn’t my iPad Air 2 affected? It can even last 2 weeks. My friend’s iPhone 7 is doing just fine.
DJDools wrote: "If it's simply down to battery health (mine is 80%), then why did the issues arise once upgrading to IOS 15.7*?"
Simple: The long process of applying the iOS update put strain on your unhealthy 80% battery and was the proverbial "straw that broke the camel's back." (Users often mistakenly blame the iOS upgrade instead of their weak, degraded battery.)
And don't wait to replace the battery – as they tend to fail gradually and then suddenly. You may then find that your iPhone is 'bricked' and you can't prepare it properly for battery replacement.
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It's been more than 72 hours since I've updated and battery is still tanking. My battery life is 92% and is supporting normal peak performance on an original SE. Any ideas?
Can you show us an Apple document that supports your claim?
It's a 2017 first gen SE, and I replaced the battery 1.5 yrs ago. It's been a workhorse. Will upgrade to the new SE at the end of the year.
Upgraded the phone. 15.7.1 was the last for the 6s and the phone is no longer supported.
I can’t confirm it, sorry.
I had battery replaced 1 year ago and Battery Health shows 97%.
Amazing. That number should be in the 90% range.
ios 15.7.1 just kills the battery. there is an hour to complete discharge. In the cold, it discharges from 100% to 1% in a couple of minutes!!!
I’m sure they want us to get a new phone every year, but here I am, posting this with my iPhone 6s.
iOS 16 has been annoying recently. I preferred earlier iOS anyway.
iOS 15.7.2 helped a little, but my phone is usually
at 1% in the morning if I didn’t charge it overnight.
Best thing you can do for your battery is plug the phone into the power adapter and let it charge overnight.....every night.
iPhone battery drain since iOS 15.7.1 update
