Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A405 Safari/7534.48.3)

Correct the charge circuit for an iPhone is 1.5 not 1 as stated earlier
 
The internal charging circuit. Having tried this with a multimeter, I've only ever gotten the iPhone to charge at a maximum of 1.5A. Even when using the iPad's 2A charger, only 1.5A goes through the wires into the iPhone's dock.

That's what I am looking for! I knew there was a speed difference in charging between the standard 1amp and 2amp iPad charger. I assume the 1amp charger won't charge at a full 1amp, maybe 8-900ma?
 
The iPhone's 1A charger outputs at just above 1A. Probably 1,050mA. The iPad's charger outputs at 2.00A. I currently do not know the maximum the iPad can draw. My guess, 2.5A.
 
I've been charging my iPhone charger with my iPad charger since the first day I had it. The battery still lasts a solid 2-3 days.
 
In the RC world, low amp charges took longer but yielded a longer lasting battery with not as much max output. Faster, higher amp chargers yielded higher top speeds but less run time.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.