Other Is this how wireless charging works?

Applegeeky

macrumors regular
Original poster
Aug 30, 2014
106
6
sorry new to wireless charging. Hope to get advice.

When I charge wirelessly for my iPhone Xs max, it remains or at times +1% after a few minutes. My pad is 10 watts. Is it supposed to be so slow?

Also my phone back becomes very warm. Won’t it spoil the battery?

:(
 

MichaelColley

macrumors member
Dec 14, 2014
52
23
Well its the max, it has a larger battery capacity. Wireless charging is relatively slow, don't expect it to go fast.

Yes to your second question. Heat is the number one enemy of lithium batteries and this is the concern with wireless charging. Many would like to argue that the performance degradation is minimal in the long run. I prefer to go on the safe side and only use wireless charging if I absolutely need to.

Why is there heat? Because the transfer between the pad and your phone there is lost energy which translates as heat.

In order to make sure maximum energy is entering your iPhone you need to make sure the pad is lined up exactly with your iPhone's wireless charging pad. This would make sure that there is a minimal amount of heat involved in wireless charging. But as you can imagine, this may be pretty hard unless you have X-ray vision to see where the pads align, so... its a guessing game.
 
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Applegeeky

macrumors regular
Original poster
Aug 30, 2014
106
6
Thanks. So even a few minutes for just 1% of battery charged is normal? Just want to make sure it’s not the pad or phone issue.
 

BugeyeSTI

macrumors 68040
Aug 19, 2017
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Arizona
sorry new to wireless charging. Hope to get advice.

When I charge wirelessly for my iPhone Xs max, it remains or at times +1% after a few minutes. My pad is 10 watts. Is it supposed to be so slow?

Also my phone back becomes very warm. Won’t it spoil the battery?

:(
Even if your charging pad is 10w the 8, 8+, X, Xs, Xs Max can only charge at a maximum of 7.5w wirelessly. It’s faster than using the 5w wired small brick but not as fast as the 12w iPad wired brick or the usb-c charging bricks for the MBP
 

Applegeeky

macrumors regular
Original poster
Aug 30, 2014
106
6
Ok. Therefore a few mins for 1% is normal? Is there an article that I can read? The heat seems dangerous for the battery :( anyway I can further reduce the cons and increase the pro ? Appreciate.
 

TheBacklash

Suspended
Oct 23, 2013
387
147
Just some anecdotal stuff on the battery degradation.
I used my 8 Plus exclusively wireless for the past year, and will do so on the XS Max.

I have used wired.. and a fast charge setup on the 8 Plus also.
I'd go grab the 8 Plus and post the screen, but it's packaged up and ready to be sent out tomorrow. But the Battery health was at 94-95% after a full year of wireless charging. (it was one of the two, and i'm on my 4th shot of bourbon atm :cool:)

If you plan on upgrading every year or two, i wouldn't even worry about it. As long as it's a certified charger and not some cheap knockoff..
9to5mac did a test on the charging, wired fast charge on the X was about 3 hours, wireless at 7.5w was about 3:45ish. 0-100% So yes slower, but not a huge difference. Fast charging gives a bunch up front unlike wireless, but then tapers off until full. Wireless seems to be a constant rate.

Again, anecdotal. You decide for yourself. It's not like there are a lot of reports of any brand of phone exploding due to wireless charging..


As for the heat, it can be the charger, a case if you have one etc. I have 2 Bestand qi certified chargers, only gets a little warm. both are 7.5w chargers. Warmer when I fast charge though.
I have one I got from AT&T that I gave to my mother on her 8 Plus, can't remember who makes it though, phone was never even warm. But pretty sure it was a 5w only.
 

Applegeeky

macrumors regular
Original poster
Aug 30, 2014
106
6
Hmmm then maybe my charger sucks. How do I know if it is fast charging ?
 

Steve686

macrumors 68040
Nov 13, 2007
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US>FL>Miami/Dade>Sunny Isles Beach>Condo
sorry new to wireless charging. Hope to get advice.

When I charge wirelessly for my iPhone Xs max, it remains or at times +1% after a few minutes. My pad is 10 watts. Is it supposed to be so slow?

Also my phone back becomes very warm. Won’t it spoil the battery?

:(
It is not normal to stay at that percentage unless you are using the phone while charging.
If it happens, restart your phone and you will see the battery reset the indicator correctly.

This has happened on my XsMax a couple of times and I thought it was because of wireless charging. Restarting my phone alleviated the issue.
 
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