If you are on the lookout for an iPhone case then the Grabit 3-in-1 iPhone case may just be what you are looking for as it is a belt clip case, a kickstand for iPhone viewing and a battery pack, and has just been reviewed by Cnet.
The Grabit 3-in-1 iPhone case utilises a swivel, spring loaded belt clip which pops out to hold your iPhone upright on a flat surface for viewing, but the goodness comes from the 1050 mAh battery which can double the iPhone battery life.
The battery pack doubles as a rubberised holster and with a single press of the clip the iPhone slides free, and you can gain the Grabit 3-in-1 iPhone case for $29.98 + $5 shipping.