iPhone 11 Pro Will using a 5w charger on an iPhone 11 Pro Max reduce battery health faster?

[now i see it]

Several years ago when I was really dumb... I used to use my iPhone 5 plugged in all the time. Whenever I was near power, which was most of the time, I'd plug it in and use it while powered. It was ALWAYS at 100%. That was when I was dumb.
Within four months of doing that every day, the battery started swelling and pushing the screen off the phone.
The guy who replaced the battery told me not to do that, and I've been careful to keep my iPhone's away from 100% charge ever since.

 

[Olivia23]

I am no expert. My husband and I both got iPhone 8+ phones within 4 days of each other. He slow charges his phone all the time, I used the 18 watt USB power adapter from Apple and did fast charging. We bought the phones in late April, 2018. His phone’s battery health is at 99%. Mine was at 90%, then I got the iPhone 11. I asked technical support and they said that the fast charging was harder on the battery and that is why my battery health was so much worse. My 8+ did get hot when charging.
I know the newer batteries are different, but, I am only using the 5 watt USB adapter.

This is just anecdotal and our phone usage does vary from each other.
But, honestly not that much.

This is true. I was reading articles about this for Samsung phones also saying that using the fast charger all the time degrades the battery and to only fast charge when necessary.

 

[Orangeman13]

Stupid question but is the 5w charger the charger that came with my xs max? Should I use this charger if I want to preserve the battery on the 11 Pro Max?

 

[bongh1993]

Stupid question but is the 5w charger the charger that came with my xs max? Should I use this charger if I want to preserve the battery on the 11 Pro Max?

With what everyone says, basically temperature is the worst enemy of the phone, 5w charges slower but at a lower temperature because of less current is pushing out, so yeah if you don't care about the faster charging time the official 5w charger and cable that came with every other older iPhone since lighting cable era you will be just fine. The difference won't be too much but 5w will be better in terms of preserving battery life, just so if you really care about it. Use the 5w to charge, don't use the phone while charging, if phone is warm from usage wait for it to cool down before charging, try not to let phone charge to 100% or let it discharge to 20% like much other say, you can either do the 30%-90% ratio or the 40%-80% ratio to preserve the life of the battery.

 

[tonybarnaby]

An 8+ battery is $49 from Apple, while the newer phones are $79. By the time the newer phones need a new battery, they will most likely be $49 also. The only thing I do is charge with the 5w charger without fail. I have no desire to fast charge while I'm asleep.

 

[Aydy]

FWIW, I have an 8+ that I keep topped up to 100% as often as possible. It's 1 year old and I use the standard 5w charger. I just checked and my battery health is 100%. Obviously, YMMV.

Same. Charging to 100% hasn’t had any noticeable negative effect on my batteries. In fact my current Xs max is still at 100% capacity in battery health but my previous phones didn’t suffer either. There is some heat while charging but my phone is always cold to touch when its maintaining 100% and still wired to charger. I do only tend to charge once daily though. Usually overnight.

 

[macher]

FWIW, I have an 8+ that I keep topped up to 100% as often as possible. It's 1 year old and I use the standard 5w charger. I just checked and my battery health is 100%. Obviously, YMMV.

I have an 8(non plus) that I keep plugged into the charger almost all the time. Mostly I have it plugged into an Anker battery bank in my work vehicle all the time. Whenever I leave the vehicle I take it off the charge and when I get back in I charge it back up. So in my case I’m almost always plugged in. When I’m at home I use an iPad charger to charge. My battery health is 85%.

 

[Jutah]

Then”battery optimization” toggle on iOS isn’t supposed to extend battery life?

i have a 11 pro max, I’m using the 18w stock charger but I’m thinking to go with 5w, feeling more safe becauseI don’t need fast charging.

With a daily charge overnight my previous xs max drop just 1% after a year.

BTW: The battery optimization function works randomly (well, I didn’t understand the pattern it works. I charge every 2 days overnight, I supposed it’s not so tricky for the artificial intelligence to understand my charge behaviors)

 

[newellj]

Using the 5W charger can't possibly hurt anything. The battery optimization needs some time to learn even a simple/repetitive pattern - I don't know how long, but I'd give it some more time.