[b5lurker]

I have been using the Richard Solo battery with my iPhone and iPhone 3G and it works fine with both. It takes awhile (2 hours) to charge the iPhone battery and the battery is only 80% or so of the capacity of the iPhone battery itself. I was just looking at the iMax Power battery that you linked to and it does look good, much bigger then the Richard Solo. The great thing about the Richard Solo battery is that you can throw it in your pocket and you don't need any extra cables to connect it up to the iPhone. I was able to connect it to my iPhone and then put it in my pocket to charge and it still fit fine. The iMax battery looks great to use on long plane flights or road trips.

The Richard Solo battery does recharge very quickly.

Steve