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newdev9

macrumors newbie
Original poster
I’ve owned a number of iPhones and I always seem to have bad luck with them in terms of battery. I’m not sure if it’s me or the phones. I’ll explain.

I know it’s controversial but I tend to peek at battery health in the settings. I know, I know: it varies, it’s not life or death, it’s not some life altering number or something that will prevent my phone from working. But still, I check it.

I have a 17 pro I purchased new in September one day after the launch date. Traded in my 14 pro which I really didn’t like. When I purchased my 14 pro brand new from T-Mobile my battery health went from 100 to 86 in 6 months. Yet it was considered “normal”. I don’t abuse my phones, game on them with the exception of the occasional light games like baseball or football which are non graphic intensive and don’t drain the battery.

I kept my 14 pro for a little over two years before I upgraded to my 17 pro. I was looking forward to some big upgrades including the vapor cooling and larger battery. Currently I’m at 83 charge cycles and I’m already at 98% health. I dropped the two percent in just the past week alone. No extreme heat or cold, light gaming, normal use. I mainly use instagram, texts, mail and calling. I hardly FaceTime. I don’t use it as heavily as my friends use theirs. I don’t plug in my phone while using it, I don’t use any third party cables and I don’t let my phone go to zero. I set my charge levels to stop at 80%. Yet here I am at 98% after just a few months and less than 100 cycles. The friends I mentioned above who have the Air and Pros who have well over 100 cycles and they’re at 100%. I don’t get it.

Again, I know my phone is fully functional and this number is considered arbitrary. But I think dropping two percent in less than a week is pretty weird. For reference I own an Apple Watch SE 2 that is now one year old. Purchased new in January 2025. That thing has been charged from 100 to 0 dozens of times, it’s been reset, no battery optimization, sometimes I forget to charge it or wear it and it’s laying dead on my dresser, and I’m ironically at 98% health on that. I don’t understand how a smaller battery that has seen way more charge cycles is at 98% but my 17 pro which has less than 100 cycles is at the same health in just 4 months.

What am I missing? Or is this just random?
 
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It's mostly random, and only has real meaning when below 80%. Then you can get a free replacement under Apple's warranty program.
 
It's mostly random, and only has real meaning when below 80%. Then you can get a free replacement under Apple's warranty program.
I understand the “below 80%” thing. So it’s just random that I’m below 100 cycles and dropped 2%? Nothing I can do about it? I feel like I’ll be at 90 or below by spring at this rate lol
 
I’ve owned a number of iPhones and I always seem to have bad luck with them in terms of battery. I’m not sure if it’s me or the phones. I’ll explain.

I know it’s controversial but I tend to peek at battery health in the settings. I know, I know: it varies, it’s not life or death, it’s not some life altering number or something that will prevent my phone from working. But still, I check it.

I have a 17 pro I purchased new in September one day after the launch date. Traded in my 14 pro which I really didn’t like. When I purchased my 14 pro brand new from T-Mobile my battery health went from 100 to 86 in 6 months. Yet it was considered “normal”. I don’t abuse my phones, game on them with the exception of the occasional light games like baseball or football which are non graphic intensive and don’t drain the battery.

I kept my 14 pro for a little over two years before I upgraded to my 17 pro. I was looking forward to some big upgrades including the vapor cooling and larger battery. Currently I’m at 83 charge cycles and I’m already at 98% health. I dropped the two percent in just the past week alone. No extreme heat or cold, light gaming, normal use. I mainly use instagram, texts, mail and calling. I hardly FaceTime. I don’t use it as heavily as my friends use theirs. I don’t plug in my phone while using it, I don’t use any third party cables and I don’t let my phone go to zero. I set my charge levels to stop at 80%. Yet here I am at 98% after just a few months and less than 100 cycles. The friends I mentioned above who have the Air and Pros who have well over 100 cycles and they’re at 100%. I don’t get it.

Again, I know my phone is fully functional and this number is considered arbitrary. But I think dropping two percent in less than a week is pretty weird. For reference I own an Apple Watch SE 2 that is now one year old. Purchased new in January 2025. That thing has been charged from 100 to 0 dozens of times, it’s been reset, no battery optimization, sometimes I forget to charge it or wear it and it’s laying dead on my dresser, and I’m ironically at 98% health on that. I don’t understand how a smaller battery that has seen way more charge cycles is at 98% but my 17 pro which has less than 100 cycles is at the same health in just 4 months.

What am I missing? Or is this just random?
It’s random, you probably got an iPhone that was close to the actual design capacity of the battery…this varies, even though the phone says 100% many get phones with anywhere between 101%-105%, the lower you get the quicker it will get to its actual 100% health and thus the sooner you will see a drop to under 100%, no matter what you do (charging to 80% etc…barely does anything).
You should be good.
 
I’ve owned a number of iPhones and I always seem to have bad luck with them in terms of battery. I’m not sure if it’s me or the phones. I’ll explain.

I know it’s controversial but I tend to peek at battery health in the settings. I know, I know: it varies, it’s not life or death, it’s not some life altering number or something that will prevent my phone from working. But still, I check it.

I have a 17 pro I purchased new in September one day after the launch date. Traded in my 14 pro which I really didn’t like. When I purchased my 14 pro brand new from T-Mobile my battery health went from 100 to 86 in 6 months. Yet it was considered “normal”. I don’t abuse my phones, game on them with the exception of the occasional light games like baseball or football which are non graphic intensive and don’t drain the battery.

I kept my 14 pro for a little over two years before I upgraded to my 17 pro. I was looking forward to some big upgrades including the vapor cooling and larger battery. Currently I’m at 83 charge cycles and I’m already at 98% health. I dropped the two percent in just the past week alone. No extreme heat or cold, light gaming, normal use. I mainly use instagram, texts, mail and calling. I hardly FaceTime. I don’t use it as heavily as my friends use theirs. I don’t plug in my phone while using it, I don’t use any third party cables and I don’t let my phone go to zero. I set my charge levels to stop at 80%. Yet here I am at 98% after just a few months and less than 100 cycles. The friends I mentioned above who have the Air and Pros who have well over 100 cycles and they’re at 100%. I don’t get it.

Again, I know my phone is fully functional and this number is considered arbitrary. But I think dropping two percent in less than a week is pretty weird. For reference I own an Apple Watch SE 2 that is now one year old. Purchased new in January 2025. That thing has been charged from 100 to 0 dozens of times, it’s been reset, no battery optimization, sometimes I forget to charge it or wear it and it’s laying dead on my dresser, and I’m ironically at 98% health on that. I don’t understand how a smaller battery that has seen way more charge cycles is at 98% but my 17 pro which has less than 100 cycles is at the same health in just 4 months.

What am I missing? Or is this just random?
I had an iPhone Pro (I think it was a 13 Pro) that dropped to 97% shortly after I got it (new at launch). I watched the battery percentage frequently for awhile and then stopped worrying about it. When I traded it in at 1 year it was still at 97%.
 
2% is nothing. Battery health is not linear. The battery is an ever changing chemical reaction inside a mold inside your phone. In my opinion, you are obsessing needlessly over something trivial at best. Is this truly how you wish to spend your life, especially over something so meaningless (in the grand scheme of things) as a phone?
 
After reading the original post in this thread, I checked the battery health on my Air, which I got on launch, and I currently have 88 charge cycles with 100% battery health.

I’m noticing a higher number regarding charge cycles compared to my 17 Pro which only has 5 charge cycles in a month of use (I got my 17 Pro at the beginning of December).

YMMV?
 
Battery health is largely just luck of the draw, and the reported percentages are estimates. Unless I actually notice a decline during regular use, I try to only look at the battery health maybe once or twice a year. Otherwise, you get fixated on every 1% drop which really doesn't mean anything.

I find it somewhat ironic that people tend to worry more about their battery health, on a device that they're going to replace in a few years, than they do about their actual physical health. People worry about their battery health more than their cholesterol numbers or blood pressure!
 
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