iPhone XS Will a wireless charger harm my battery?

wayland1985

macrumors 6502a
Original poster
Jan 16, 2008
516
5
I’ve been a plug-in charger kind of guy for years: but I just got a new desk job.

I’m curious: will a wireless charger do any harm to a phone battery if you’re constantly picking up and putting the phone down on the charger?
 
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Relentless Power

macrumors Nehalem
Jul 12, 2016
30,628
30,903
I’ve been a plug-in charger kind of guy for years: but I just got a new desk job.

I’m curious: will a wireless charger do any harm to a phone battery if you’re constantly picking up and putting the phone down on the charger?
You will find a varying opinions on this topic. Some will tell you that will be ‘no harm’ to your battery whatsoever, and others will tell you that there is potential to cause harm to the battery with a wireless charger due to heat transfer over the course of time.

I would say in most cases, it’s likely not detrimental to the battery, but there are so many variables, that it could be affected as well. It’s a two-fold situation that you have to see both sides on.
 

zorinlynx

macrumors 603
May 31, 2007
5,618
6,579
Florida, USA
No, however keeping your battery at 100% all the time isn't good for it. It's better to let it drain through the day and charge it when it gets low.
 
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C DM

macrumors Sandy Bridge
Oct 17, 2011
47,781
16,176
I’ve been a plug-in charger kind of guy for years: but I just got a new desk job.

I’m curious: will a wireless charger do any harm to a phone battery if you’re constantly picking up and putting the phone down on the charger?
A few threads that could be of some help:

https://forums.macrumors.com/threads/is-it-true-that-wireless-charging-wears-the-battery-faster-than-cable-charging.2150623/

https://forums.macrumors.com/threads/wired-vs-wireless-charging-what’s-better-for-battery.2146307/

https://forums.macrumors.com/threads/does-wireless-charging-iphone-8-or-x-kill-battery-life-or-work-slower-than-wired-charging.2126174/
 

iLLUMI

macrumors 6502a
Aug 1, 2012
513
154
I had a wireless charger which was stolen from my car. I was about to order another one when I thought I'd just do a quick Google search to see if there are any issues with wireless charging.
The one thing of concern that I found is that wireless chargers shorten the life span of your battery. Thats the last thing I want to happen to my iPhone, especially as they cost so much.
So I've gone back to wired charging and stick to the 30% battery charge rule.
 

C DM

macrumors Sandy Bridge
Oct 17, 2011
47,781
16,176
I had a wireless charger which was stolen from my car. I was about to order another one when I thought I'd just do a quick Google search to see if there are any issues with wireless charging.
The one thing of concern that I found is that wireless chargers shorten the life span of your battery. Thats the last thing I want to happen to my iPhone, especially as they cost so much.
So I've gone back to wired charging and stick to the 30% battery charge rule.
30% battery charge rule?
 

Nerdyaf

macrumors member
Mar 18, 2019
72
11
30% battery charge rule?
i think it refers to charging 30% of the battery at one go, e.g. from 40% to 70%. i think the theory behind it is to breakup the charging so that the battery get less heated up.

I’ve been a plug-in charger kind of guy for years: but I just got a new desk job.

I’m curious: will a wireless charger do any harm to a phone battery if you’re constantly picking up and putting the phone down on the charger?
if you are asking if wireless charging damage your battery, it does get warmer, which degrades the battery faster. does that amount of heat cause significant degradation? idk. but there are ways to minimise the heat, e.g. chargers with cooling system, remove your cover, use a slower charger, etc

if you are asking if constantly switching between charging and not charging damages the battery, then probably no.
 

I7guy

macrumors Core
Nov 30, 2013
20,616
8,469
Gotta be in it to win it
You will find a varying opinions on this topic. Some will tell you that will be ‘no harm’ to your battery whatsoever, and others will tell you that there is potential to cause harm to the battery with a wireless charger due to heat transfer over the course of time.

I would say in most cases, it’s likely not detrimental to the battery, but there are so many variables, that it could be affected as well. It’s a two-fold situation that you have to see both sides on.
This. And to add, I am in the habit of charging to about 80%, either using a wireless charger or the ipad brick. I let the battery drain to 40% and then charge it up to 80%.
 

C DM

macrumors Sandy Bridge
Oct 17, 2011
47,781
16,176
i think it refers to charging 30% of the battery at one go, e.g. from 40% to 70%. i think the theory behind it is to breakup the charging so that the battery get less heated up.
Perhaps. However there are really no specific rules that are needed for small devices like an iPhone or an iPad -- use and charge as you need/want basically, and avoid extremes like getting too hot often and/or for long.
 
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Newtons Apple

Suspended
Mar 12, 2014
22,764
14,927
Jacksonville, Florida
I’ve been a plug-in charger kind of guy for years: but I just got a new desk job.

I’m curious: will a wireless charger do any harm to a phone battery if you’re constantly picking up and putting the phone down on the charger?
You other choice is to not charge your phone at all and just plug it in when you get home and go to bed.
 

noobinator

macrumors 603
Jun 19, 2009
6,384
5,361
Pasadena, CA
Batteries are "harmed" anytime you add to heat to them, so anytime you charge it whether it's wired or wireless. That's the nature of a battery. The jury is still out which method harms your battery more. The more heat created = more harm though.
 
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