Effects of fast charging

nickthorley

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I know its said that fast charging a device via usb puts a larger strain on the battery than a slower standard 2A charge and should be avoided if it isnt necessary ie if you only need an overnight charge. My question is, does the same apply to fast qi charging or is that ok due to the fast version still being less current than a slow mains charge?

Thanks
 

Matty

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If you are using a certified Quick Charge 3.0 charger with a compatible device, there should be no damage to your device. Quick Charge 3.0 ha a new feature called INOV (Intelligent Negotiation for Optimum Voltage), which allows for a better power output and a more optimized charging cycle by dynamically adjusting the charging voltage over the battery charging cycle. However, if you just use a Rapid charger that you by from the side of the street then yes that may cause damage.

With regards to the Qi Charging. Many Qi chargers today have maximum output of 5V/1A which will charge a Galaxy S7 from 9% to 100% in about five hours. BUT with the new Qi Fast charger, your Galaxy S7 can be charged from 9% to 100% in just over two hours.

So even if you use the Fast Qi charger, its still going to be slower than your normal Quick Charge 3.0 cable alternatives. So i wouldn't worry at all about any sort of damage to you phone. I use a standard non quick charge, charger for my Blackberry PRIV which has an output of 1,300 mA and the Qi wireless charger has 1,000 mA. :)
 

nickthorley

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I have a Anker powerport quick charger and supplying that from an anker quickcharge 3 wall charger or car charger (which ever is applicable). I just wondered if using the wireless quick charge when i dont necessarily need quick would be damaging the battery more
 

TabGuy

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How long do you keep a phone? If you're in for more than 2 years then it may warrant being cautious. Otherwise why bother?

I quick charge (wirelesly) everywhere. I never think about it.
 

jeetu4444

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Iam using quick charge 3 on my axon 7 no issues here... 80% battery in 30 mins that's is awesome.. Wonder what's quick charge 4 will get...
 

JimA

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I've been using wireless quick charging since the day they released the edge. I leave it on the charger every night and use the AOD as my night clock. Never had a problem.
 

ZOMMBIE1

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How long do you keep a phone? If you're in for more than 2 years then it may warrant being cautious. Otherwise why bother?

I quick charge (wirelesly) everywhere. I never think about it.

Exactly even 3 years should be fine👍 I personally only keep a phone for like 6 months. Upgrade between the S and Note series. Only exception was this year with the whole N7 disaster.
 

D13H4RD2L1V3

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Note that wireless charging also creates some extra heat. I noticed that from the time I had my Galaxy Note 7.

Heat is a battery's worst enemy and is a main effect of quick-charging. I would recommend charging it in a cool room.
 

Mooserman15

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I mess around with electronics and can tell you that QuickCharge is TERRIBLE for the health of a battery. You won't notice the effects immediately because they are long-term.

You can't pump high voltage directly into a battery, like what Qualcomm says they do. If you do that, your battery explodes. The reason your phone doesn't explode is because there are regulators built in (the phone), lowering the voltage to sane levels and increasing the current. This is not very efficient and creates lots of waste heat. This heat is bad for the battery, bad for the electronics elsewhere in the phone, and uncomfortable to hold/touch.

Batteries are a little more forgiving for high charge current. The way nerdy people describe the charge (or discharge) rate relative to the capacity of the battery is C rate. Assuming a 100% efficiency (for simplicity, I know it won't happen), 1C is a full charge or discharge in an hour. 2C is a full charge or discharge in 30 minutes. Think of it as an algebraic equation where C is the capacity of the battery. (C is uppercase. We are talking about electrical capacity, not lightspeed.) Charging with a very high C rate (you don't need to worry about doing this accidentally) will blow up the battery. Low C rates cause less mechanical stress and space-wasting crystals than high C rates, in turn resulting in more capacity loss per cycle the faster you charge.

So do research on how your quick-charging works. Avoid high voltage. And only use high current when necessary, not in the overnight charging that you technically shouldn't even be doing.
 

nickthorley

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Thanks Mooserman15. I dont actually do overnight charging but i was using that as a term to mean when time isnt important. I tend to put the phone on a non rapid qi charging pad when i am sat for a period of time so it lives in the 60 - 80% band normally and i find if i put it on a pad when i get up, the 1 hour before i leave the house is enough to take it to 100%. In the car I have two cigarette points so have one with a non QC charger connected to a non rapid charge qi pad and then in the front for when i have a need to use the sat nav part of the phone or I am in a situation where i have less than 40% remaining and only a short journey, i have a QC3 power point. I was just wondering whether to upgrade the non fast qi pad to a fast qi pad as if my phone is at 60% then it cant charge to 100% in my normal commute time where a qi fast charger would.

With regard to qualcomm - i am not entirely sure what will happen with my S7 Edge as its a exynos version so no qualcomm and technically no QC either but the samsung rapid charge seems to be activated if a QC3 charger is used. Its definitely quicker but not sure if thats using all the power of QC or not
 

Dan TheMan86

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Isn't Samsung's "Fast Charging" different from Qualcomm's "Rapid Charging"?

And what's wrong with letting your phone charge overnight? I put my phone on a Nokia DT-900 wireless charging pad overnight. Its 0.75A out, so it doesn't activate Fast Charging. I also have another one on my desk at work that I keep my phone on. This S7 battery drains relatively quick with my use, and I would be at 40% or less after a 9 hour work day if I didn't keep it charging. If my phone ever gets even warm while charging, I have a desk fan that I point towards it and it stays under 85*F. If I'm Fast Charging with a cable, I'll move the phone every couple minutes to make sure it's not building up heat on the surface of the table. Sometimes I put it on a fan if it gets over 90*F while charging, or I just turn it off and let it charge.
 

sparksd

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Isn't Samsung's "Fast Charging" different from Qualcomm's "Rapid Charging"?

And what's wrong with letting your phone charge overnight? I put my phone on a Nokia DT-900 wireless charging pad overnight. Its 0.75A out, so it doesn't activate Fast Charging. I also have another one on my desk at work that I keep my phone on. This S7 battery drains relatively quick with my use, and I would be at 40% or less after a 9 hour work day if I didn't keep it charging. If my phone ever gets even warm while charging, I have a desk fan that I point towards it and it stays under 85*F. If I'm Fast Charging with a cable, I'll move the phone every couple minutes to make sure it's not building up heat on the surface of the table. Sometimes I put it on a fan if it gets over 90*F while charging, or I just turn it off and let it charge.

From this, it would appear that Samsung's "Fast Charging" and Qualcomm's "Rapid Charging" are the same:

Charge test: Battle of the fast chargers - page 2 - GSMArena.com

Other sites indicate the same, that it's really just a marketing strategy, not a technical difference.
 

clrdust

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Not sure if this question goes here. Will a quick charge chipset on like LGG4 get charged fast with a quick charge 3 charger
 

Morty2264

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If you are using a certified Quick Charge 3.0 charger with a compatible device, there should be no damage to your device. Quick Charge 3.0 ha a new feature called INOV (Intelligent Negotiation for Optimum Voltage), which allows for a better power output and a more optimized charging cycle by dynamically adjusting the charging voltage over the battery charging cycle. However, if you just use a Rapid charger that you by from the side of the street then yes that may cause damage.

With regards to the Qi Charging. Many Qi chargers today have maximum output of 5V/1A which will charge a Galaxy S7 from 9% to 100% in about five hours. BUT with the new Qi Fast charger, your Galaxy S7 can be charged from 9% to 100% in just over two hours.

So even if you use the Fast Qi charger, its still going to be slower than your normal Quick Charge 3.0 cable alternatives. So i wouldn't worry at all about any sort of damage to you phone. I use a standard non quick charge, charger for my Blackberry PRIV which has an output of 1,300 mA and the Qi wireless charger has 1,000 mA. :)

Thank you so much for this post - it was very informative!
 

ToddK

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Overnight charging even on a fast wireless charger is fine...

this is a ridiculous thread.

as soon as the battery reaches 100% it stops charging
 

ToddK

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You see the phone is being powered by the charger, the drain on the battery is zero, so it doesn't discharge...
 

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