Durable, compact, easy-to-use and lighting fast, Intocircuit’s portable charger is the best all around external power source on the market.
The best waterproof portable charger is the Unifun Waterproof External Battery. This charger has enough capacity to charge an iPhone 6 about 4 times. It has two USB ports to charge two devices simultaneously. One port has a higher amperage for charging tablets.
The best battery case for the iPhone 5S is the Lenmar Meidian Battery Case. It doubles the the battery life of your iPhone 5S, while also sporting a durable and unobtrusive design.