With the iPhone 15 fashions that got here out final 12 months, Apple added an opt-in battery setting that limits most cost to 80 p.c. The concept is that by no means charging the iPhone above 80 p.c will enhance battery longevity, so I saved my iPhone at that 80 p.c restrict from September 2023 to now, with no dishonest.
My iPhone 15 Professional Max battery degree is at the moment at 94 p.c with 299 cycles. For lots of 2024, my battery degree stayed above 97 p.c, however it began dropping extra quickly over the past couple of months.
I left my iPhone at that 80 p.c restrict and at no level turned the setting off or tweaked it. There have been some days after I ran out of battery as a result of I used to be with no charger for a lot of the day, and there have been different instances that I needed to convey a battery alongside to ensure I did not run out of energy. It wasn’t at all times handy to maintain it at 80 p.c, however there have been days when it did not have an excessive amount of of an impression.
It was at all times a deal with when the iPhone randomly determined to cost to one hundred pc, which is one thing Apple has baked in to the 80 p.c restrict to make sure the battery degree stays calibrated.
For essentially the most half, I charged utilizing USB-C fairly than MagSafe, however there was some MagSafe charging combined in. There was in all probability a 70/30 break up between wired charging and MagSafe charging. I did usually let my battery get fairly low earlier than charging, and it did not sit on the charger for lengthy durations of time too usually. Most charging was finished in a room at 72 levels. I am including this context as a result of temperature is an element that may have an effect on battery longevity, and wi-fi charging is hotter than wired charging.
You’ll be able to evaluate your degree battery to mine, however listed below are a pair different metrics from MacRumors employees that even have an iPhone 15 Professional Max and didn’t have the battery degree restricted.
- Present capability: 87%. Cycles: 329
- Present capability: 90%. Cycles: 271
I haven’t got loads of information factors for comparability, however it does appear that limiting the cost to 80 p.c saved my most battery capability greater than what my co-workers are seeing, however there is not a serious distinction. I’ve 4 p.c extra battery at 28 extra cycles, and I am unsure struggling via an 80 p.c battery restrict for 12 months was in the end value it.
It is doable that the true positive aspects from an 80 p.c restrict will are available in two or three years fairly than a single 12 months, and I will preserve it restricted to 80 p.c to see the long run impression.
I did set my iPhone 16 Professional Max to an 80 p.c restrict, however I do not know if I need to proceed the take a look at given the lackluster outcomes I had from 2023 to 2024. Will the thermal adjustments within the iPhone 16 fashions make any distinction? Possibly, possibly not. There is a 90 p.c cost restrict choice too, and that is likely to be extra possible than 80 p.c for most individuals, particularly those who have telephones with smaller batteries.
Let me know your present battery capability and cycle rely within the feedback beneath, and weigh in on whether or not you suppose Apple’s limits are worthwhile.