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Tangentially, I don't have an iPhone 15 but I am optimistic based on what I've read at https://support.apple.com/en-us/HT210512 https://support.apple.com/en-us/

by mcny 3y ago

Tangentially, I don't have an iPhone 15 but I am optimistic based on what I've read at https://support.apple.com/en-us/HT210512 https://support.apple.com/en-us/HT210512 > About 80% Limit with iPhone 15 models > With iPhone 15 models, you can choose between Optimized Battery Charging, 80% Limit, and None. > When you choose 80% Limit, your iPhone will charge up to about 80 percent and then stop charging. If the battery charge level gets down to 75 percent, charging will resume until your battery charge level reaches about 80 percent again. > With 80% Limit enabled, your iPhone will occasionally charge to 100 percent to maintain accurate battery state-of-charge estimates. Does anyone here have any insight into why this is limited to the newest iPhones? Is it an actual hardware upgrade? Do you recommend this 80% option to preserve battery life as in will this help my battery last a few more years? Thank you in advance. Disclaimer: I only have an iPhone SE 2020 so I can't try it out just yet. I hope the next iPhone SE 2024 or 2025 will have this 80% limit option as well.

MBCook 3y ago
No one has come up with a good theory so far. There’s a small chance there’s a change in the battery charging circuits, but it could just as easily be a simple segmentation decision. I think you’re right that it’s purely a life preserving thing. Filling up a battery to 80% is better for it than 100%. So if people are willing to make that choice they may be able to use the battery a little longer as they’re not stressing it as much.
tarentel 3y ago
My macbook air does this as well. This isn't limited to newer phones. I checked mine, I have an iPhone 12, and this option is in there. According to the support page it's available on iOS 13+.
- madeofpalk 3y ago
  No, you only have "Optimised Charging" on your older phone. As described in the article parent linked to, 'Optimised Charing' aims to charge your phone to 80% overnight, and then ~1 hour before you wake up, fully charge it. The iPhone 15 has an additional option that caps the charge to 80%. It never does that final top up before you wake up. > With iPhone 15 models, to choose between Optimized Battery Charging, 80% Limit, and None, go to Settings > Battery > Battery Health & Charging > Charging Optimization and choose an option.

by mcny 3y ago

MBCook 3y ago

No one has come up with a good theory so far. There’s a small chance there’s a change in the battery charging circuits, but it could just as easily be a simple segmentation decision. I think you’re right that it’s purely a life preserving thing. Filling up a battery to 80% is better for it than 100%. So if people are willing to make that choice they may be able to use the battery a little longer as they’re not stressing it as much.

tarentel 3y ago

My macbook air does this as well. This isn't limited to newer phones. I checked mine, I have an iPhone 12, and this option is in there. According to the support page it's available on iOS 13+.

madeofpalk 3y ago
No, you only have "Optimised Charging" on your older phone. As described in the article parent linked to, 'Optimised Charing' aims to charge your phone to 80% overnight, and then ~1 hour before you wake up, fully charge it. The iPhone 15 has an additional option that caps the charge to 80%. It never does that final top up before you wake up. > With iPhone 15 models, to choose between Optimized Battery Charging, 80% Limit, and None, go to Settings > Battery > Battery Health & Charging > Charging Optimization and choose an option.