iPhone 15 Pro Max battery drops faster after iOS26 update

[hajime]

Anybody else has this problem? Usually at the end of the day the battery was like 70% or more but after the update, it became 39% today.

 

[BigMcGuire]

My wife is having massive battery drain after installing the update (this morning). She has the same phone as I do. I have had no problems on my 15 Pro Max. Yes, I know it's the first day, so we'll see how it does tomorrow.

I just did the volume up volume down and held power to reboot her phone to see if that improved anything. (Will report if this helps).

So, she's dropping at a 2-3x faster rate than normal. Granted, usage is a little higher too...

 

[hajime]

Thanks for sharing. I just checked the battery usage history for the past three days.

Min:

9/15 16%
9/16 22%
9/17 61% (Didn't use as much as the past two days but ended up higher usage!)

I hope this could be fixed soon.

 

[hajime]

Also it took 6 hours to charge from 61% to 97% when I was charging the phone while asleep. Charging is longer than usual after iOS 26 update.

Could this be another scam to get us to buy the latest iPhone?

 

[Bichon]

One should always wait a few days after a major update for the phone to finish indexing and performing other initialization tasks before assessing its implications on battery life.

 

[hajime]

OK. I will get back a week later if the problems remain.

 

[BigMcGuire]

My wife’s phone drain this morning was crazy - she was 80% before leaving for work after taking it off the charger when waking up. (Just a few hours) - using it normally. But we’ll give it a few days too. Mine, on the other hand, is improved from iOS 18.

 

[hajime]

In my case it looks like draining is faster than charging (see post #4).

 

[BigMcGuire]

Yeah something ain't right - what charger you using? (not the 5w charger right?). Neither my phone or my wife's 15 Pro Max is doing this. (Nor my friend's). We all use 20-30+ watt chargers tho.

 

[hajime]

Yeah something ain't right - what charger you using? (not the 5w charger right?). Neither my phone or my wife's 15 Pro Max is doing this. (Nor my friend's). We all use 20-30+ watt chargers tho.

Anker Laptop Charger, 140W Max USB C Charger:

https://www.anker.com/ca/products/a2697-anker-charger-140w-4-port?variant=52184075043184

Before the iOS update, it charged the phone very quickly. I still think the problem is due to iOS26.

 

[BigMcGuire]

Have you done the volume up, volume down, hold power to do a reboot? (Sorry for the questions) - anything abnormal showing in the battery usage screens?

 

[hajime]

I am here to report that the battery life seems to have returned to normal.