Get your Samsung Galaxy S4 juiced up and ready for a long day of texting, calling, and networking with Mophie's Juice Pack, a protective case that also bulks up your phone with extra battery life. Forget about hunting for power outlets just flip the switch on the back of your case and enjoy an 80% longer battery for the rest of your day. The Juice Pack looks as splendidly as it functions. A smooth finish and flawless design blend with, rather than obscure, the original shape of your Samsung Galaxy. Just charge your case whenever you charge your phone and you'll always have an extra battery when you start and end your day.