With iPhone backup life becomes very easy because I was on the hunt for something that would be more petite and not cost a hundred bucks. The iPWR Super pack is a little square wafer that can be attached to the port at the bottom and iPhone or an iPod touch. The form factor is the same width and depth as the iPhone and I found it to give the iPhone about twice the battery duration that using the iPhone by itself. this device makes the iPhone seem too long and a bit awkward, but as an emergency supply of energy for your iPhone it does the job well.
iPhone backup The unit has an on and off switch, which I found useful when I was not using it. The iPRW comes in both a White finish which I used with my iPhone 3G and a black finish which Mary has used with both the iPhone first generation and now the iPhone 3GS. Mary actually ended up using both of these units and liked carrying one in her purse and keeps one at work for convenience. When not attached to an iPhone or an iPod, the iPWR Super pack has a top lid that covers its connector and USB port.