Just a quick update in case someone else stumbles across this post in the future. I never got a response but after much googling I discovered the ZeroLemon Case and battery. I bought the ZeroLemon Samsung Galaxy S4 7500mah Extended Battery and the ZeroLemon Orange / Black Zero Shock Series Hybrid Case. I've been using for about a month now and I'm very pleased with both. I'll never go back to a normal battery again.