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Is wireless charging good for your battery?

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AB__CD

Senior Member
Apr 18, 2014
600
133
The thing causes my S8 to heat up, even when I turn off the fast option, more so than fast wired charging. Is it really good for my battery health when the phone is heating up for the entire two or three hours on the charger?
 

Skander1998

Senior Member
May 23, 2012
1,614
607
26
Doha
Samsung Galaxy Note 3
Samsung Galaxy S7
The phone will stop charging automatically if it thinks the temperature is not comfortable.
Do not stress over things that are mentioned in the manual, inductive charging will generate more heat than a wire, but the phone is more than capable of managing the process and stopping if things get too hot.

And no, the temperature isn't going to get high enough to damage your battery. (Unless you are using unauthorized wireless chargers / fakes that can cause the actual metal casing to heat up, google this).
 

Dark5tar

Senior Member
Sep 25, 2012
118
14
Auckland
I too had this question back when I bought my Wireless Charger for my S7. Interesting to get more feedback from the others. E.g. Does it shorten the battery life quicker considering it heats up the battery more than on cable.
 

mklpickle

Senior Member
Feb 22, 2006
104
25
I've wireless charged my s7 since I got it and also wireless charge my s8. I've also added wireless charging to an LG G3 and G4. IMO it does not degrade the battery and fast. The way I look at it, it saves the charging port from 100's maybe 1000's of plugs/unplugs. It's also a point of device failure, so from that perspective, it's better. Again, IMHO.
 
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Squalll13

Member
Sep 25, 2011
33
2
How about if you introduce the extra variable of putting the thin metal thingies for magnetic car mounts between the phone and the case? Does that change the situation?
 

ljg600

Senior Member
Jan 21, 2013
90
30
Another variable is a case, which can add to heat build-up. Overall, I have seen nothing definitive that suggests that heat won't adversely effect battery life. Notwithstanding the money companies make selling QI chargers.

Sent from my SM-G955U using Tapatalk
 
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BandOfBrothers1

Senior Member
Sep 13, 2016
98
11
The fan in the authentic Samsung Desktop charger only activates if fast wireless charging is turned on in the phone.
The fan is to cool the phone.

I use the Samsung desktop stand but usually just normal charge it to which apart from typical heat being discharged I've not experienced any other issue.
I do not use a case.

There is opinion that constantly using Fast Charging can reduce the batteries condition over time. Wether you believe this is personal opinion. I've only Fast charged maybe 2-3 times if I've needed a quick boost of juice.
 

ratcityrain

Senior Member
Oct 7, 2010
115
12
Seattle
I noticed this too when I put my new S8+ on the wireless charger built into my truck. This was the first time I tried it so I wasn't sure if the phone getting hot was a normal thing or not
 

Lily-PITAKA

Member
Jan 23, 2018
28
2
Hong Kong
goo.gl
I too had this question back when I bought my Wireless Charger for my S7. Interesting to get more feedback from the others. E.g. Does it shorten the battery life quicker considering it heats up the battery more than on cable.

Hi, the phone can handle it if it gets too hot during wireless charging.

Always be assured since that the electric current of wireless charging is 1A, which is lower than the current for wired charging 1.6A. That's to say, it creates less heat while charging. So actually the wireless charging helps prolong the longevity of your lithium-ion battery, except for the longer charging time.

Besides, only semiconductors that flow through current could produce heat (such as your phone's cover), the lithium-ion battery doesn't have current go through, so it's safe from the heat.
 

kingersj1

Senior Member
Nov 30, 2014
213
75
I only wireless charge in my car. My dash mount is setup for during the warmer months I will have the the AC it vent blowing cool air directly on the back of the phone. If I don't do this, I get the wireless charging pause error caused by the heat sensors.
 

Tinystonego

Member
Mar 28, 2018
19
0
The thing causes my S8 to heat up, even when I turn off the fast option, more so than fast wired charging. Is it really good for my battery health when the phone is heating up for the entire two or three hours on the charger?

Fear not, the phone battery doesn't generate heat itself, the smartphone is actually smart enough to protect itself from the heating generated by the wireless charging unless you put it under the extreme heating weather, so the phone should be safe from the heat.
 

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    I've wireless charged my s7 since I got it and also wireless charge my s8. I've also added wireless charging to an LG G3 and G4. IMO it does not degrade the battery and fast. The way I look at it, it saves the charging port from 100's maybe 1000's of plugs/unplugs. It's also a point of device failure, so from that perspective, it's better. Again, IMHO.
    1
    notice it too.
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    Another variable is a case, which can add to heat build-up. Overall, I have seen nothing definitive that suggests that heat won't adversely effect battery life. Notwithstanding the money companies make selling QI chargers.

    Sent from my SM-G955U using Tapatalk