Hi guys! I've been researching Battery Cases for my iPhone 5 and am wondering if anyone has any that they would recommend? In particular I am looking for the THINNEST and LIGHTEST case possible (trying not to add too much extra bulk) that looks decent. I don't care too much about the mAh, as long as it would add an additional 70% charge or so to the phone. Some of the brands I've come across have been: Mophie, iBattz, TYLT, MiLi, Mojo and Lenmar Thoughts? Thanks in advance.