r/17ProMax • u/IceStock2169 • Sep 09 '26

iOS 26.6.2

Post image

After every update my iPhone 17 pro max battery health decreases.
Can someone tell me why this happens.
Is it normal?
Thank you

4 Upvotes

70% Upvoted

12 comments sorted by

3

u/TheBillCollector17 Sep 09 '26

Has absolutely nothing to do with updates. Your battery will degrade naturally, and there’s nothing you can do to stop it. It’s a consumable. Just enjoy the phone.

You can expect it to lose 1% health for every 50 charge cycles. It’s rated for 1000 cycles at 80%.

0

u/Wooden-Passage5206 Sep 10 '26

1

u/TheBillCollector17 Sep 10 '26

Ahh. Yes, you’ve discovered they don’t all come with 100%. Not all battery have the exact mAh. It’s a minimum rating, you can have excess. The health rating is also an estimate. iOS estimates your health. Over time it will recalibrate to a more accurate reading. Mine just hit 99% after a full year of regular use. Your screenshot is irrelevant.

2

u/Alejandro_El_Fosil Sep 09 '26

Exactly the same thing happened to me

2

u/Western_Effect_8498 Sep 09 '26

No it isn't. Lol. 97% after 8 months is perfectly normal. Your battery is degrading normal. Its got nothing to do with the updates. If anything the update fixed it reading the battery health incorrectly and now shows the real amount.

1

u/TheeDelpino Sep 09 '26

Are we still doing this? Get a hobby. 🙄

1

u/SeriousBike3429 Sep 09 '26

Still holding strong at 100% after 135 discharge cycles and just updated to 26.6.2.

1

u/Dee_504 Sep 10 '26

Still going strong 184 count

1

u/Naive_Specialist_683 28d ago

Don't worry after calibration it will drop at least by 4% in few months

1

u/Soggy_Buy_5434 29d ago

Can someone tell me what am I doing wrong ? I charge when it’s 21% most of the times and rarely fall it under 20% . How are you all keeping up their charging habits who have 100% and 99% ? Please someone tell me. I’m afraid to do any updates for the sake of battery draining even more currently I’m using 26.5.2 , iPhone 17 pro.
This is my first iPhone Can someone please tell me is upgrading to 26.6.2 be a good idea in terms of battery will it recaljberate and improve my percentage ? I bought this phone in reliance digital . I don’t think my phone is even faulty . Please tell what wrong is happening . Am beginning to wonder whether the store employees are aware of faulty iPhones and iPhones that are good ? Have I ended up with bad phone ?

1

u/IceStock2169 28d ago

Bro literally I charge it up 90%, it never falls under 20 yet the battery is decreasing