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Fairly comprehensive discussion on the Apple Forums. Even a very competent electrical engineer there agree's that if you charge it quicker you are not doing your battery any good:

https://discussions.apple.com/thread/2580579?start=45&tstart=0

Apple supply it with a certain charger for a reason, use it. I can attest to the fact that the faster charging with a higher rated charger (approved by apple) ruins my battery much faster!

If that was true then Apple would not list it as compatible with every single iPhone, including the original:

http://store.apple.com/us/product/MD836LL/A/apple-12w-usb-power-adapter?fnode=3c
 
Every iPhone supports faster charging. My 5S and 4S charge incredibly quickly on an iPad charger. Been doing it for 4 years now. No ill effects.
 
Every iPhone supports faster charging. My 5S and 4S charge incredibly quickly on an iPad charger. Been doing it for 4 years now. No ill effects.
Cant really charge quicker on those older phones as it has been already shown that they draw the same amount of power from the iPad chargers as iPhone chargers.
 
Charging with more powerful adapters is hard on the li-ion battery. While it will give you a quick charge it will take a major toll on the batter life after a few months. There are hundreds of articles/videos on why this is so.

I used my 3GS almost exclusively with official iPad chargers the last two years and it kept up like a champ.

A charger doesn't "push" amps, it provides them like a pool. Like trying to drink from a glass with a straw while refilling it with a bigger straw. A lot if the "device not supported" messages are because the charger doesn't provide enough pool for the phone and device to pull from and "under amperage" is hard on the auto voltage regulation.
 
iPhone 6 charges at 1.5A. (measured at 23% battery left). You're welcome. See attachment.
 

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Point being there is an optimum temperature within that range. I personally believe that when Apple ships it with an adaptor they ship it so that it charges at an optimal rate/temperature for that device. Whilst you can charge with a more powerful adaptor, that does increase the heat. It may not be at or above 45C but on the curve from optimal to 45C it is certainly higher and as such has a degradation on the battery. That is very clear from that article. I'm sure Apple has run the maths on how much extra degradation there will be and have found the risk to be tolerable, but then, their tests are always on naked iPhones and there is no note of what service they conduct the tests on. So I believe users end results will vary. For me, I have not had luck with higher amp chargers. I will do what a commenter just above here does. Charge with the correct charger at night and when I can, and a faster charger when I need the extra charger quicker.

Remember the "rapid" car charges that came with Allllllll Nokia phones? Isn't that similar to what we are now talking about?

The car charger charged the battery at a higher amp because it was onlyfor use in car where normally you are not in there very long and then the home charger for slow night charging! If the 90s phone companies had it figured out I'm willing to bet Apple now had it figured out. (Within reason/theory/mathematics)Higher amp charge for when you really need it and slow steady to really fill up those battery cells!

Note: I'm not saying any amp is okay, I'm saying what a company allows will be. Use your had people! Rapid will charge but it won't be a solid charge, slow charge to relive the cells!
 
I have to be an ass again and say that the iPhone 5 and 5S can ALREADY charge significantly faster with the 2A charger than they do with the 1A charger. In my experience they charge nearly twice as fast.

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Why does the iPad mini for example is just fine charging at the higher rate that is associated with the iPad charger and doesn't instead include a slower iPhone charger instead? Seems fairly similar logic can apply to iPhone 6 Plus then, for example.

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The news is that the new phones can actually draw more power and actually charge faster when used with iPad chargers, while the old ones couldn't.

False, the old one could charge way faster with iPad chargers.

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So explain to me, why on all my iPhones 4S and below they are noticeably warmer/ verging on very warm when using a higher amp charger than when using the charger they are shipped with. Your telling me all 4 devices are faulty?

No, simply they draw more current (but still safe) that causes more heat. Anyone who knows about electricity knows about Ohm's law and heating of electrical circuits due to resistance.
 
It maybe safe, but it is not good for the battery to do this. I swear the quality of MR reporting his hitting rock bottom recently. I mean is this article for real?

Any device will charge quicker if you pump up the amps. Likewise it will charge slower if you use less amps. I don't recommend anyone does this regularly.

As noted earlier in the thread, the phone is *regulating the current itself*. Do you really believe that Apple is designing the phone to draw an unsafe amount of current? Come on.
 
I have to be an ass again and say that the iPhone 5 and 5S can ALREADY charge significantly faster with the 2A charger than they do with the 1A charger. In my experience they charge nearly twice as fast.

Anecdotally I would have said the same thing despite being told otherwise for years. After having done the tests (posting the results earlier) that is not the case. They pull 6w maximum.
 
Well, at least a few here are calling it right. Li-ion will die an early death when it's not charged slowly and cycled on occasion. Yes you can push it, but plan on replacing it well before it's normal lifespan.

Wonder what genius decided this was news.

The guys at candlepowerforums must be laughing their butts off right now.
 
I really cannot believe a thread had to be created for this. Anyone with basic common sense could find out that the original 12W chargers will charge quicker than the included 5W charger. You don't need a science degree - the higher the voltage the faster it charges. Apple only included the 5W one to make the package smaller, and both cost AU$25 each - so I'd go the 12W.
 
Well, at least a few here are calling it right. Li-ion will die an early death when it's not charged slowly and cycled on occasion. Yes you can push it, but plan on replacing it well before it's normal lifespan.

Wonder what genius decided this was news.

The guys at candlepowerforums must be laughing their butts off right now.

Except that's not true until you are pushing the cells WAY past the point that the 6+ is being pushed as it is still well under the 1C rate which in itself is considered to be quite manageable.

I really cannot believe a thread had to be created for this. Anyone with basic common sense could find out that the original 12W chargers will charge quicker than the included 5W charger. You don't need a science degree - the higher the voltage the faster it charges. Apple only included the 5W one to make the package smaller, and both cost AU$25 each - so I'd go the 12W.

And I can't believe that we are still seeing people post the same wrong information year after year, despite having the proof posted in the very thread they are posting in! NO iPhones until the 6+ (and to a lesser extent, the 6) charge faster with the 12w chargers!

And I'd keep working on the science degree as the voltage is exactly the same on both style chargers.
 
for some reason my video above did not work....

FOR ALL OF YOU, here is THE FULL ANSWER, and the reason people think it's charging at more then 6 watts, you're welcome.

 
for some reason my video above did not work....

FOR ALL OF YOU, here is THE FULL ANSWER, and the reason people think it's charging at more then 6 watts, you're welcome.

YouTube: video

That matches my results and conclusion, however it does appear that the 6+ is capable of charging at more than 6w.
 
And so is the iPhone 6 (Plus).

The iPhone 5s or earlier was not designed for that amperage therefore even if you charge with a 2.1A charger, it would be the same as charging with a 1A charger.

But now that the iPhone 6 (Plus) can charge faster with a 2.1A charger, this means that it was designed for that amperage.

If it was not, then it would be like the iPhone 5s or earlier who would not charge faster with a 2.1A charger.

Although there are plenty of folks here that will tell you there iphone 5/S charges faster when connected to a 10/12W iPad charger...
 
I really cannot believe a thread had to be created for this. Anyone with basic common sense could find out that the original 12W chargers will charge quicker than the included 5W charger. You don't need a science degree - the higher the voltage the faster it charges. Apple only included the 5W one to make the package smaller, and both cost AU$25 each - so I'd go the 12W.

You should really read what you write before you press SUBMIT. First, just because an adapter puts out more wattage doesn't mean the device will charge faster. It's NOT common sense. The device will regulate the amount of wattage it will draw. Hook up a USB charge monitor and watch the amperage fluctuate as the device charges. Some devices will charge at a higher rate with a higher wattage charger, some won't.

You apparently do need a science degree, as the voltage from these chargers is constant. It's the amperage that changes. It's always 5V output regardless of how many watts the charger is rated.

Lastly, I've been "speed-charging" most of my devices for the past year, including my i-devices and the battery in my iPhone 5 is as good as the day I bought it. That goes for all my tablets, Windows phones, etc. If it does injure the battery, it's not during the useful lifetime of it.
 
sorry if someone already asked this question, but if the ipad charger charges the iphone 6s faster, why didn't apple include this charger in the first place?
 
I have to be an ass again and say that the iPhone 5 and 5S can ALREADY charge significantly faster with the 2A charger than they do with the 1A charger. In my experience they charge nearly twice as fast.

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False, the old one could charge way faster with iPad chargers.

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No, simply they draw more current (but still safe) that causes more heat. Anyone who knows about electricity knows about Ohm's law and heating of electrical circuits due to resistance.
So as I said I don't see how it can be faster if it has been shown that te older phones won't draw more power with the iPad chargers. Even tests have been done to time it all showing there's not a meaningful difference in time charging those phones with an iPad connector vs an iPhone one.
 
Lastly, I've been "speed-charging" most of my devices for the past year, including my i-devices and the battery in my iPhone 5 is as good as the day I bought it. That goes for all my tablets, Windows phones, etc. If it does injure the battery, it's not during the useful lifetime of it.

How? Phones previous to the 6/6+ are limited to ~6w total draw on any charger.
 
I really cannot believe a thread had to be created for this. Anyone with basic common sense could find out that the original 12W chargers will charge quicker than the included 5W charger. You don't need a science degree - the higher the voltage the faster it charges. Apple only included the 5W one to make the package smaller, and both cost AU$25 each - so I'd go the 12W.
How would that work if the older iPhones restrict how much power they draw and even on chargers that provide more they still only draw about the same amount that they do on chargers that provide less. It's as simple as that. Certainly no degree in anything is needed to understand that part or it.

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sorry if someone already asked this question, but if the ipad charger charges the iphone 6s faster, why didn't apple include this charger in the first place?
As some speculation in the thread pointed out, likely so that the packaging isn't bigger. And probably to be consistent with having a smaller charger for iPhones which is also cheaper for them to manufacture and include.
 
guys. there are circuitry inside these chargers and the device itself to limit the charge speed and capacity of the batteries. High spd charges aren't great for the life of the batteries. But there are definitely things you can do to optimize it via hardware of software. I have been using my ipad charger with my iphone 4S for over 3 years now...battery is still good.
 
look at my video above that I posted. The 6 not the PLUS def don't charge any quicker using the iPad charger as I show in the video. However it could be a different case with the iPhone 6 Plus, since the battery is 50+% bigger then the iPhone 6.
 
guys. there are circuitry inside these chargers and the device itself to limit the charge speed and capacity of the batteries. High spd charges aren't great for the life of the batteries. But there are definitely things you can do to optimize it via hardware of software. I have been using my ipad charger with my iphone 4S for over 3 years now...battery is still good.

That's because it charges exactly the same on both chargers with the 4s.

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look at my video above that I posted. The 6 not the PLUS def don't charge any quicker using the iPad charger as I show in the video. However it could be a different case with the iPhone 6 Plus, since the battery is 50+% bigger then the iPhone 6.

That's not quite what the video shows. The 6 WILL take advantage of the iPad charger by using the additional power for the screen or other phone internals while still charging the battery at the full rate. This will make a difference in how fast it charges under many scenarios.
 
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