I love my iPhone 4S, but I am one of many who doesn't get great battery life from the phone. Apple has done some firmware updates that 'addressed' the problem, but I think battery life on my phone is still sub-par.
I've looked at a few battery cases, but many were pretty clunky and didn't seem worth the hassle. A friend tipped me to the Boost Case, and I found it on Amazon and gave it a try. The case I ordered fits the iPhone 4S and iPhone 4, and is made of a hard rubber nonslip surface. You charge the case with a micro USB cable (included). The flat built-in battery puts out 17
