I now have two years of data with my iPhone limited to an 80 percent charge, and I don’t think it’s been worth it.
1 Like
Why not? Can you explain why?
Agreed! I didn’t have nearly as bad battery drain as this author seems to, but I’ve decided to go back to 100% + optimize charging.
Most days I ended with 5-15% battery left but I found it an unnecessary stress for a couple percent battery capacity retention
1 Like
I was four years into my iPhone 11 Pro ownership before the battery health dropped below 100%. I did not have the 80% thing set. I just used my phone, daily, without any regard to battery, unless I was travelling.
Normal home/work meant:
- I wasn’t constantly using it, and
- I was on wifi most of the time
2 Likes
I charge to 100% as well. For a while I was doing the 80% and didn’t have an issue or run out by the end of the day. Quite frankly, I haven’t even thought about it until this post.
I’m sorry, but I don’t understand your question. Apologies for being dense. 
Maybe it’s me. I assumed you wrote the statement above the link stating it wasn’t worth it.
No, I was quoting the article. I put the title in quotes to indicate that, at least that was my intent. 
1 Like
No worries……………my bad.
1 Like
I’ve been trying to take care of my battery powered devices since the ni-cad days. And because the li-on batteries in our iPhones have a finite number of charges I tried to not constantly charge them to 100% or totally exhaust the batteries. So when Apple introduced the 80% limit option I started using it on my iPhone 11.
I replaced it with an iPhone 16 Pro last year, and store it turned off, but charged around 50% and use it as a backup for my 1PW account. Currently my iPhone 11’s maximum capacity is 91%.
I keep my original iPhone, purchased in October 2007, charged to around 50% and check it once a month. It still works.
4 Likes
It’s worth when you sell it second-hand.
1 Like
My 15 ProMax dipped pretty quick after purchase. I want to say like 3-5 months after I got it, it started dipping. Then it consistently dropped here and there landing at 85% about 18 months in. It stayed there until I got the 17 Pro Max on launch day.
I think I got a “meh” battery.
But yes, I did some research and the 80% thing seems like it doesn’t really make a huge difference and the fact you don’t have full battery capacity each day could be inconvenient.
I looked at it but I’m just gonna live the way I live, man. The dude abides.
For me, the 80% thing would be fine 99.9% of the time … until there is an earthquake at 6am, or my 81 year-old Mum has another ambulance callout at 2am. So, I fully charge.
In fact, I have an ABC rule: Always Be Charging.
3 Likes
I’ve been working from home almost exclusively for many years, so the 80% limit has been totally sufficient for my needs. I have no need to stress the battery nedlessly as I’m usually very close to a charger.
…and for full-day travel or visits to the company office, I carry a Anker power-pack.
1 Like
For me it “works”, max 80%. And slow charging (cable only during the night, never fast charging). My iPhone 16 MP is still on 100% battery performance.
I wonder why there is no proven statement which says: It is definitely better and do this, or that. If you ask 100 users you might get various positive and negative answers.
I “believe” that "max 80%) helps to not stress the battery.
1 Like
I have a 1 year old 16 pro max
171 charging cycles
100% health
I restrict charging to 80%
1 Like
I just traded in my iPhone 15 Pro Max for an iPhone 17 Pro. It was restricted to 80% charging most of the time. It had 100% health, but that was not surprising given that it only had 151 charging cycles.
Is it worth it for a person who trades in a phone so quickly? Probably not. But the science is clear. Check out Figure 6 in the following article, for example.
2 Likes
The Battery University link is good. Limiting to 80% prolongs the battery if you can also stay out of the bottom 20%, essentially. If it’s regularly pushing you into the 1-20% range, it might be net harmful.
1 Like
On my phone, I split the difference at 90%. I don’t have hard data on it, but I’m pretty much never running out of battery. I listen to podcasts a lot, I’m on the phone a lot, but I’m not sucking down data-intensive stuff over cellular (very little YouTube, etc. when I’m not at home). I usually don’t dip below 30%, even after a long day out of the house.
I rotated my last phone to my wife, and I have a 16e. 77 cycle counts and 100% battery health thus far (fingers crossed).
That said, I do have some automations that kick in low-power mode when my battery drops below something like 70%. I also carry an Anker battery pack, so I’d be in good shape even if it did go low.
I figure it should help somewhat.
I assumed the same thing so it’s not just you.
1 Like