Can you charge an iPad from an iPhone charger?

[cmaier]

Don't like that. Current is how much water is delivered per second. Voltage is how high the water is.

Take mine for what it's worth - from a former Radio Amateur. The voltage will be the same in any USB power brick - it's the deliverable wattage in this case that matters.

Imagine a stream of water. Voltage is how fast the stream is going and the current (amps or milliamps) is like how big a cross section the stream is .

The iPad battery is a bucket that has to be filled. The iphone charger buts out a stream going 5 volts fast but it is a thin tiny stream. The iPad charger puts out a stream that is also 5 volts fast but it coming from a firehose. Which one will fill the iPad battery faster? Right.

Both will work but only the iPad charger will fill the battery in a reasonable amount of time. The iPhone charger puts out a 1 Amp wide stream and the iPad charger puts out a 10 Amp wide stream.

Hope that explains it.

 

[ciaran00]

Don't like that. Current is how much water is delivered per second. Voltage is how high the water is.

Voltage can't be how high the water is - that doesn't make any sense. Voltage should be relative pressure - water would flow from a point of high to low pressure (ie: reverse flow of electrons).

Current is what you said.

 

[Hmac]

A pc USB port is far from high powered. Let's clarify this.

Pc/mac - 5v @ 500ma
iPhone power brick - 5v @ 1000ma
ipad powerbrick - 5v @ 2100ma

Yes...so we're talking....

Pc/mac - 2.5 watts
iPhone power brick - 5 watts
ipad powerbrick - 10 watts

My approach is to buy the necessary number of 10 watt iPad chargers to replace iPod/iPhone chargers around here. 10 watts will charge an iPhone just fine. I seriously doubt the performance of a 2.5 watt charger on the iPad.

 

[hamlinspahn]

iPad Power Consumption

Yes...so we're talking....

Pc/mac - 2.5 watts
iPhone power brick - 5 watts
ipad powerbrick - 10 watts

My approach is to buy the necessary number of 10 watt iPad chargers to replace iPod/iPhone chargers around here. 10 watts will charge an iPhone just fine. I seriously doubt the performance of a 2.5 watt charger on the iPad.

The state that the iPad is in is critical to what will and will not charge it.

So the answer is if you want it to charge it will charge regardless of PC/Mac, iPhone Brick, or iPad Brick just not necessarily while in use. So to get back to the point of the original post if you only want to carry one charger carry the iPad charger. And here it is straight from the horses mouth
http://support.apple.com/kb/HT4060

 

[Hmac]

The state that the iPad is in is critical to what will and will not charge it.

So the answer is if you want it to charge it will charge regardless of PC/Mac, iPhone Brick, or iPad Brick just not necessarily while in use. So to get back to the point of the original post if you only want to carry one charger carry the iPad charger. And here it is straight from the horses mouth
http://support.apple.com/kb/HT4060

Right. As I said, I'm replacing all my little "charging stations" around the house and at work with 10 watt iPad chargers.

I like the idea of Apple's iPad Power Adapter (not shipping yet) and have a couple on order. I also have the InCase Combo Charger on order.

 

[tys]

I've been charging my iPad overnight using the tiny adapter that came with my iPhone 3GS. It's always 100% when I wake up. The iPad charger is faster, though, so use it if you're in a hurry.

 

[WhoPhD]

Has anyone managed to charge + iTunes connect at the same time?

The closest I've come is to use an old Firewire-iPod connector, together with a Belkin adaptor to "upgrade" the connection to 2008 standards ... this will happily charge the iPad, but iTunes won't see it

It saves on a power outlet I guess, but the Belkin thing is worth about as much as an Apple power brick.

Don't like that. Current is how much water is delivered per second. Voltage is how high the water is.

Nup. Think of a pipe: Volts are the size of the pipe, amps are the pressure. Amps are what you feel when you get zapped. Like a water pistol, you'll feel it but won't get harmed if the voltage is small enough. A high voltage is also harmless if there's no current ... but once it starts flowing, it's deadly.

CK.

 

[yvrgal]

Can you charge the iPhone with the iPad charger? Traveling will be easier with only one charger.

Yes you can it charges twice as fast.

 

[cmaier]

Nup. Think of a pipe: Volts are the size of the pipe, amps are the pressure. Amps are what you feel when you get zapped. Like a water pistol, you'll feel it but won't get harmed if the voltage is small enough. A high voltage is also harmless if there's no current ... but once it starts flowing, it's deadly.

CK.

Nope. Volts are the height difference between one end of the pipe and the other. Amps are the volume of water passing through a cross section. Capacitance is the size of the pipe. Resistance is caused by obstructions in the pipe.

 

[dpdapper]

The state that the iPad is in is critical to what will and will not charge it.

So the answer is if you want it to charge it will charge regardless of PC/Mac, iPhone Brick, or iPad Brick just not necessarily while in use. So to get back to the point of the original post if you only want to carry one charger carry the iPad charger. And here it is straight from the horses mouth
http://support.apple.com/kb/HT4060

Actually, the correct link to the KB article is: http://support.apple.com/kb/HT4327

 

[mmmtastybusch]

Okay now that we've established that you can charge iPhone with the iPad charger and vice-versa, let me ask this-

Will charging either device with the opposite charger harm the battery in any way? For instance, as mentioned above I like to charge my iPad with an iPhone charger overnight as well, since a slow charge works fine. Will charging it with the lower wattage charger harm the battery if you do it for an extended period of time? Like if I charge it like this every night for a year?

Same with the iPhone, will using the iPad charger for a rapid charge damage the battery?

 

[Ecoh]

But can you use the iPad power brick to charge an iPhone or iPod? Will the 10-watts fry the iPod?

When travelling, it would be very nice to only have to carry one charger.

I have been using my iPad power brick to charge my iPod Nano for several months. Works fine, no problems so far.

 

[takeshi74]

Will charging either device with the opposite charger harm the battery in any way?

No.

Imagine a stream of water. You can imagine Voltage to be how fast the stream is going and the current (amps or milliamps) is like how big a cross section the stream is .

Old post I'm replying to but whether it's electricity or water, current is flow.