The app was a joke, LOL
"They have an app for that"
which I guess only non-iphone users get.
The phone battery, sure if might be 1000mah, but the circuitry probably won't support close to 2 amps without being overloaded. Maybe, maybe not. Pretty expensive way to find out. and they have fixed the exploding ipod/iphone problem, I think.
"Apple offers a battery replacement for $79, plus $6.95 shipping, subject to local tax. Apple disposes of your battery in an environmentally friendly manner."
There are several add on battery packs for the iphone at less than that.
Imagine having an extra 2000mah on the back of your iphone.
R