New Apple 12W USB Power Adaptor charges iPhone 5 in 3/4 the time

[gmanist1000]

Originally Posted by bushman4

Fact is Fact. Anyone that owns a 12w charger use it on your Iphone5 and let us know. I've compared the charging times and I can say from actual test it only tales 3/4 the time that the 5w charger takes to charge the Iphone5.

Here's proof the iPhone draws 5W from the 12W charger.

http://www.youtube.com/watch?v=DC4gPxc89Wg&sns=em

[WilliamG]

Originally Posted by gmanist1000

Here's proof the iPhone draws 5W from the 12W charger.

http://www.youtube.com/watch?v=DC4gPxc89Wg&sns=em

Yep, there's proof indeed. I can't even fathom why people think the 12W charger is any faster with an iPhone...

[chambone]

Originally Posted by Radiating

In case anyone had any doubts as to the iPad charger charging faster:

That only tells us that one charger draws more mains power than the other. While I don't doubt that an iphone can draw more than 1 amp, the differences you're getting could just as easily be the result of variances in charger overhead/loss, at least partly.

If you want to measure an iphone's power draw accurately you need an amp meter and a usb cable to sacrifice.

[Bishwasher]

Can anyone tell me if THIS ADAPTOR is the three prong plug used in England or not... The store doesn't say either way

Sent using Tapatalk

[jeremiah239]

Originally Posted by Archer1440

If only factual posts were made here, there would only be half the posts.

The iPhone 5 can only draw a bit over 5 watts no matter what the capacity of the charger, put an in-line meter on the circuit and prove it for yourself as I have.

The 12W charger (I have two) DOES charge the iPad 3 faster, but only by 45 minutes or so. It can draw up to 13W.

The 12W charger stays a lot cooler than the 5W on the iPhone and the 10W on an iPad. This should translate to a longer service life. So there's no reason not to use the 12W on the iPhone- but it won't charge faster.

THIS! everybody thinks the iPad chargers charge iPhones faster but they are wrong!

[InfinitiG]

Originally Posted by InfinitiG

sorry but the iphone can accept only 5W .... dream on

Like I said, iPhone can only accept 5W.

[flipn0tic]

Originally Posted by Archer1440

If only factual posts were made here, there would only be half the posts.

The iPhone 5 can only draw a bit over 5 watts no matter what the capacity of the charger, put an in-line meter on the circuit and prove it for yourself as I have.

The 12W charger (I have two) DOES charge the iPad 3 faster, but only by 45 minutes or so. It can draw up to 13W.

The 12W charger stays a lot cooler than the 5W on the iPhone and the 10W on an iPad. This should translate to a longer service life. So there's no reason not to use the 12W on the iPhone- but it won't charge faster.

This is the only post in this thread that needs to be read.

[Radiating]

Originally Posted by chambone

That only tells us that one charger draws more mains power than the other. While I don't doubt that an iphone can draw more than 1 amp, the differences you're getting could just as easily be the result of variances in charger overhead/loss, at least partly.

If you want to measure an iphone's power draw accurately you need an amp meter and a usb cable to sacrifice.

That's not how electricity works. If the iPad charger was really half as efficient as the iPhone charger it would melt itself. The electricity has to go somewhere and the chargers already. Current chargers are 85%-95% efficient and the less efficient ones already read 100 degrees. If the iPad charger was half as efficient as the iPhone charger it would literally catch fire and explode.

Also the iPad takes 10 watts of power while charging so it would have to take 20 watts if the silly "overhead" concept were true.

[chambone]

Originally Posted by Radiating

That's not how electricity works. If the iPad charger was really half as efficient as the iPhone charger it would melt itself. The electricity has to go somewhere and the chargers already. Current chargers are 85%-95% efficient and the less efficient ones already read 100 degrees. If the iPad charger was half as efficient as the iPhone charger it would literally catch fire and explode.

Also the iPad takes 10 watts of power while charging so it would have to take 20 watts if the silly "overhead" concept were true.

Whats silly is trying to determine a device's power draw by measuring the power drawn from mains by its charger. Anything other than measuring from the usb cable is pointless.

[Radiating]

Originally Posted by chambone

Whats silly is trying to determine a device's power draw by measuring the power drawn from mains by its charger. Anything other than measuring from the usb cable is pointless.

No it's not, you can use simple logic to determine something is true without directly measuring it.

For example:


We know that AC to DC chargers of normal modern design are 85%-95% efficient. The iPad charger draws 70% more power than the iPhone charger when it is charging an iPhone 5. Therefore we know that the iPad charger charges the iPhone 5 with more power than the regular charger, if it is a charger of normal modern design.


We know that the iPad charger draws 10 watts while charging the iPad, which takes more power to charge than the iPhone. The iPad charger also draws 10 watts while charging the iPhone 5. Therefore we know that the iPad charger is charging the iPhone with more power.

The iPad charger draws 70% more power than the iPhone charger when it is charging an iPhone 5. We know that any electricity taken out of the mains that is wasted in a charger has to go to heat. The iPad charger would have to waste 6-10 times more energy than the iPhone charger to maintain it's power draw and charge at the same rate. This level of heat would cause a fire. The iPad charger is not on fire when it charges the iPhone 5, therefore we know that the iPad charger charges the iPhone with more power than the regular charger.


Do they not offer basic logic and reasoning classes in the Netherlands?

[chambone]

And again the condescending attitude. Is that normal where you come from? There's no need to feel attacked.

By your logic an ipad charger charges the iphone5 70% faster. Do you really think this is true?

[meistervu]

Well, the actual current draw is limited by the device (Phone), not the charger, unless the draw is greater than the charger can provide.

If the iPhone can draw 6w instead of the 5w in the specs. then it would charge faster with an iPad charger. All one has to do is test. I have both chargers but I don't have any interest at this point.

[gmanist1000]

Originally Posted by chambone

And again the condescending attitude. Is that normal where you come from? There's no need to feel attacked.

By your logic an ipad charger charges the iphone5 70% faster. Do you really think this is true?

Nope.