iPad Charger for iPhone?

Erm, hang on. Forgive me if I'm wrong, as I don't have an electronics engineers degree however I am a qualified and licensed railway signalling and telecoms engineer, so I've some electronics knowledge. It doesn't really matter what current a charger is capable of kicking out, if a device only wants 1 amp that's all it will take from the supply source. The only problem comes from chargers that kick out lower current then the device's nominal current requirement, in which situation the device would not charge.

Least that's my understanding.

cflowers81 wrote:

Least that's my understanding.

Yes, you're correct. merlin1188 will no doubt disagree with you. However, they also believe that Apple is wrong when Apple says the iPad charger is safe to use on the iPhone.

This has turned into a joke post and I wish apple would delete it. I guess all the years in school I went through and all the money I spent was a waste of money learning all this stuff...All this started out was is HOW TO MAXIMIZE YOUR BATTERY LIFE.

I am sure if you read through this entire post stedman and apeworm have provided all the necessary information to back up why the ipad charger is ok to use. I am so impressed by their knowledge of this entire subject I swear they could have been one of my professors.

This is the initial post:

I know I can't use my iPhone charger for my iPad, but if I use my iPad charger for my iPhone, willy phone charge faster?

It had absolutely nothing to do with "HOW TO MAXIMIZE YOUR BATTERY LIFE". And yes, steadman and Apfelworm are quite knowledgeable. It was kind of you to acknowledge that.

Best of luck.

merlin1128 wrote:

This has turned into a joke .......... I swear they could have been one of my professors.

Many parts of it were funny, I admit, like the confusing of Perdue (a Maryland chicken processing company) with Purdue (a university system in Indiana). I'm sure had they been your professors they would have tried to teach you at least that much, and would probably also prefer that you became familar with how to abbreviate your doctorate degree.

They might also have expected you to remember and understand what you were writing from day to day.

But, perhaps not. I just checked the program requirements and none of those skill sets appear to be specifically called for .... you're probably safe.

I still maintain that the load draws whatever current it requires, regardless of what the source is capable of outputting. It could be capable of kicking out 10amps, the iPad is still only going to draw 2.1amps and the iPhone is still only going to draw 1amp from it.

Also, I support the above with the following example:

Using TomTom's High Speed in car charger which features 1 x 1amp and 1 x 2.1amp USB sockets to charge my iPhone takes the same amount of time to charge whether it's plugged into the 1amp or 2.1amp socket.

Using the same in car charger with my iPad, plugging it into the 1amp socket produces the same result as when plugging it in to the PC USB socket. Current output is lower then the nominal requirement. It will charge, but it will charge slower. The second I plug it into the 2.1amp socket, charging returns to normal speed.

Did you mean Purdue University?

Perdue makes chicken products.

I really trust someone who can't even spell what college they went to.

Everything you stated is wrong.

I have a phd in thaumaturgic from Miskatonic Univ.

I just have to say, I laughed for a long time reading this. Wish it was still going on.

Plase allow me, I couldn't wait to join in this conversation. Correct me if I am wrong.

The device will only draw the current it needs, true, but does not apply to battery charging since the load varies (capacitance of the cable and the capacity of the battery).

So a charging battery will take any current until it explode. IE more hungry, more current.

However you should imagine there's a current limiter or controller chip in all iDevice. Which monitors the capacity of the battery and the current going into it, prevents over charging, overheating or damaging batteries life.The controller is connected to the Lithium-ion contorller and temperature protect circuit. It also tells the software that it's in charging state or in non-charging power plug-in state.

Right there's a 500 pages book about charging lithium-ion polymer.

If you an Apple Engineer, you would want people to use a single united charging station, same socket etc to simplify things. You would love to use your macbook charger to charge you iphone (only if possible, I mean, yea why don't we all use thunderbolt to charge things right now?! It has 10W)

So iPad Charger for iPhone? YES YOU CAN!

p.s. if you connect the iDevice cable with a 5m extention USB (for example), it might not charge, the capacitance in the cable is too high, drawing/consume too much current, it would either (overload the charger) or (the charger cut off itself), in both case it won't charge.

I agree with all your posts. Although there is one slight fact you have wrong. By allowing your iPhone to be charged by a 10W iPad charger you will slowly ruin the iPhone battery. It's guaranteed you will not notice on the first couple of charges but after about 30 it will break. It will although make your iPhone charge at a much faster rate

By the way 30 is an approximation

If there were any truth in that, do you really believe Apple would advertise the iPad charger in their online store as being compatible with every device down to an iPod shuffle? Or do you know something that Apple's engineers don't? Don't post nonsense.

LT.Apple wrote:

By allowing your iPhone to be charged by a 10W iPad charger you will slowly ruin the iPhone battery.

Why do you post such outrageous statements without providing a single proof?

How can the 10W iPad charger possibly ruin an iPhone, even in the long run?

I guess I should take a Typing and English course just for you. Does the Community College where you received your GED have them?