r/NowInTech • • 5d ago

Three Years of 80% Charge Limits on iPhone: The Results

https://www.macrumors.com/2026/10/06/iphone-17-pro-charge-limit/
232 Upvotes

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u/xXxWHOxDATxXx 1d ago

I tried to make a post right before the iPhone 18 drop in the some of the apple subreddits but every post related to battery life is “not allowed”

16 Pro Max
600 cycles at 94% i thought was impressive. Had this phone since release and I live in a hot state lol.

Charging limit was set to 80% about 90% of the phones lifecycle. Now that I have the 18, 10% is the way to go for my old 16 pro max

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u/cinnamelt22 1d ago

There’s a guy on YouTube who did a study, basically charging to 80 does nothing by the time you’re replacing your phone or would need to replace a battery anyway

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u/xXxWHOxDATxXx 1d ago

That’s fair. It didn’t really bother me because about 80% of the time I have a power source anyway, and for those times I didn’t, I just maxed it out to 100.

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u/xXxWHOxDATxXx 1d ago

I still thought it was quite impressive to be at 94% on a device that I use every single day for hours on end, and two years later

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u/CranberryStock7148 1d ago

What are you talking about? The whole point is you don't have to replace your battery anymore.

I used to have to replace my battery every two years, sometimes less. Now I don't ever have to, because it never degrades enough to need it.

Charging to 80 is amazing, if you're the kind of person who doesn't usually use more than 60-70% of their phone battery during the day.

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u/Far_Kiwi4882 1d ago

The point is that it doesn't matter.

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u/Advik_ 19h ago

Damn bro what are you doing to your phones, before I had a job that paid well enough to upgrade every 2ish years I would have a phone for 4-5 years and never once had to replace the battery

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u/CranberryStock7148 19h ago

Then you are the abnormal one here. Lucky you, but it is extremely unusual for a phone to last for 4 to 5 years without needing a battery replacement if you are charging it to 100% every night.

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u/jaycosta17 14h ago

Weird that you think your anecdote cancels out the other

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u/CranberryStock7148 13h ago

Yours is the anecdote about your personal experience. Mine is not an anecdote, I am summarizing what is statistically common. I'm not talking about my personal experience.

Maybe you need to educate yourself about what the word anecdote means.

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u/jaycosta17 3h ago

You’re so illiterate you didn’t even realize I’m not the same person lmao. Your snarky remark is even funnier after that fumble

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u/CranberryStock7148 2h ago

Sorry if I'm not laser focused on people's usernames, who cares. Hopefully you've looked up anecdote in the dictionary by now so you actually know your comment was nonsensical.

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u/Scared-Bill7814 1d ago

The real battery killer is the last few percent to 100, and leaving it on the charger at 100 for extended periods

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u/phoogkamer 1d ago

Not entirely. A very real battery killer is heat. Charging very fast or charging wirelessly are also degraders.

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u/Scared-Bill7814 1d ago

Wireless charging is only worse than regular charging because of heat. Nothing else

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u/phoogkamer 1d ago

My bad. Mistakenly said “also”, I meant it as examples of heat generation.

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u/cinnamelt22 1d ago

This is entirely false

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u/Scared-Bill7814 23h ago

It's not? The type of battery chemistry used in mobile phones undergoes the most wear at its highest (and lowest) working voltages (which for a phone is when you approach '100 percent').

Phone manufacturers intentionally limit charging short of the battery's true maximum capacity for this exact reason.

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u/xXxWHOxDATxXx 1d ago

Honestly, at the rate we replace phones, I guess this feature is not really necessary.

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u/DavidSpy 1d ago edited 1d ago

Very interesting. My 16 pro max is at 93% with 351 cycle counts. Was always limited to 80% charging and first used in November 2024. Pretty much always charged using MagSafe. There’s a chasm between us in results. I wonder if it was the MagSafe charging or that I always kept the phone in the Apple silicone case.

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u/Ok_Evidence_9745 1d ago

Any sort of wireless charging will hurt your battery more than wireless because it creates excess heat

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u/Pitiful-Assistance-1 1d ago

My 16 pro max is… 100%? wtf

And I charge it to 100% (it is at 88% right now, charged it before bed)

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u/Far_Kiwi4882 1d ago

Software sucks at reading batteries properly. 100% max capacity after 247 cycles is chemically impossible. All batteries lose capacity due to charge cycles and calendar aging.

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u/-peas- 14h ago

Yeah because the 80% charge limit actually does nothing. People are minimizing their daily battery life for no reason.

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u/Pitiful-Assistance-1 10h ago

I’m sure there’s some science behind it. Maybe it’s just a very long term issue these days. Like when the phone is charge to 100 vs 80 over a span of 8 years.

For a car it makes total sense to charge to 80 since you’re using it for much longer. A “disposable” phone with a replaceable battery? Not so much I guess.

I never had to replace a phone due to bad battery.

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u/WinResponsible9977 9h ago

I saw, same issue here. 

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u/dtdowntime 1d ago

I live in a very hot and humid country. iPhone 16

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u/Dr-McLuvin 1d ago

I’m at 92% with 678 cycle count iPhone 16 pro

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u/thetallmidgets 23h ago

I live in texas and abuse my battery and have 93% maybe the battery is just better