That's exactly the idea behind the Nomad Leather Wallet for iPhone ... are genuine leather and contain a 2,400 milliamp-hour (mAh) battery. (By comparison, Apple's Smart Battery Case has 1,877 ...

A leather wallet is not only a thing of beauty, but a practical choice that protects your phone while allowing you to leave your wallet at home. This case from Snakehive is made from genuine top ...