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Puddled

macrumors 6502a
Original poster
Jun 9, 2017
548
602
Just a few words of advice for those thinking about fast wireless chargers.

Fast charging does degrade the battery. Not by much and if not done regularly, the damage is minimal, but it isn't phone friendly. The slower you charge your phone, the better for it. Fast wireless charging generates a fair amount of heat. The Samsung fast chargers have fans built in. (Highly recommended)

I have a Samsung S6 which has Wireless and fast charging. I find both to be really really useful. This is my approach:

I reserve fast charging for cable only. The S6 comes with an adaptive fast charger and enabling the fast charging option in the battery settings is quick and easy. Its also free.

I reserve normal charging for my wireless chargers i have at work and at home. Wireless chargers are not the most efficient things, so if you use them with piffling 0.5A plugs, they don't work properly (keep kicking in and out). I use old 2A tablet chargers that i have lying around. They work great. My wireless chargers cost €0.75c from amazon. i don't do fast wireless charging as it requires expensive chargers and i am cheap.


In day to day use, my wireless chargers trickle charge my phone throughout the day, either at work or at home. This is the best for the phone's battery and keeps my phone fully charged. It is also super convenient to just plonk my phone on the charging mat when not in use. An added bonus is i usually know where my phone is (on the mat).

If i have to have a quick top up for some reason, i simply plug the phone in using my Samsung charger. With fast charging set on by default in the settings, i don't have to change anything to get a rapid boost.

Charging this way ensures there is a physical difference required for me to change my charging speed, gives my the maximum amount of ease and convenience, doesn't cost me a penny and is best for the phone.

I've had my S6 for two years and my battery is still at 76% of its original capacity.
 
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Cascades42

macrumors 6502
Jan 25, 2016
347
198
UK
Isn't the fast charging most androids have the Qualcomm thing which is different to the USB C fast charging which the iPhone has?
 

Will22

macrumors 65816
Dec 4, 2011
1,349
707
Isn't the fast charging most androids have the Qualcomm thing which is different to the USB C fast charging which the iPhone has?

One he is talking about wireless fast charging and two he’s talking out his...
 

Will22

macrumors 65816
Dec 4, 2011
1,349
707
Go on, please explain...

I’ve been using it without any loss in battery but seeing as you have obviously tested it to see a small loss then you must have evidence that it does degrade a battery more than any other type of charging. You made the statement so back it up.
 

Puddled

macrumors 6502a
Original poster
Jun 9, 2017
548
602
I’ve been using it without any loss in battery but seeing as you have obviously tested it to see a small loss then you must have evidence that it does degrade a battery more than any other type of charging. You made the statement so back it up.

Ffs.
 

fedecape

macrumors 6502
Oct 23, 2011
414
32
Miami, FL
So Samsung (wireless) fast charger with fan is good, but fast (wireless) chargers without fans are not good because of the heat?
Why does it degrade the battery, because of the heat? My room is well cooled, and so is my office (where I plan on using wireless charging).

Fast chargers (even wired) generate a lot of heat too, how is fast wireless charging different?

(BTW - I'm not calling you out or criticizing, I'm just trying to learn and understand)
 

Puddled

macrumors 6502a
Original poster
Jun 9, 2017
548
602
So Samsung (wireless) fast charger with fan is good, but fast (wireless) chargers without fans are not good because of the heat?
Why does it degrade the battery, because of the heat? My room is well cooled, and so is my office (where I plan on using wireless charging).

Fast chargers (even wired) generate a lot of heat too, how is fast wireless charging different?

(BTW - I'm not calling you out or criticizing, I'm just trying to learn and understand)

Heat is the enemy of batteries.
Charging batteries isnt a 100% efficient process so the loss is usually in the form of heat. The faster you charge, the more heat is generated and the more wear and tear you put on the battery. This is the reason that manufacturers dont set your phone to fast charge as default. It isnt a free lunch.

Wireless charging is doubly inefficient, hence the need for fans with high power units. My wireless chargers are low power and they dont get warm at all. If i use fast charging with my plug, my phone does get warm. Noticebly (but not uncomfortably) so. Samsung have a warning about this in the settings for fast charging.

As for proof that heat and rapid charging cycles isnt kind to batteries, there are plenty of sources on the internet that validate this. Battery university just one of them.

Ymmv obviously
 

Will22

macrumors 65816
Dec 4, 2011
1,349
707
Heat is the enemy of batteries.
Charging batteries isnt a 100% efficient process so the loss is usually in the form of heat. The faster you charge, the more heat is generated and the more wear and tear you put on the battery. This is the reason that manufacturers dont set your phone to fast charge as default. It isnt a free lunch.

Wireless charging is doubly inefficient, hence the need for fans with high power units. My wireless chargers are low power and they dont get warm at all. If i use fast charging with my plug, my phone does get warm. Noticebly (but not uncomfortably) so. Samsung have a warning about this in the settings for fast charging.

As for proof that heat and rapid charging cycles isnt kind to batteries, there are plenty of sources on the internet that validate this. Battery university just one of them.

Ymmv obviously

So the fan in the Samsung wireless fast charger is not to cool the charger?

You do realise how o_O you sound. The fan is to cool the charger:rolleyes:

I’m going to subscribe to this for the fun of this thread.
 
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