Well, this pretty much solves the battery issue with the evo. I'm still at 90% at 6 hours of moderate use. I used to jump from 100 to 80% after about 2 hours, but now it's actually trickling down slowly and not making any sudden drops in battery life. Was considering returning the phone, but now I'm keeping it. The design is actually really nice - much better than the photos on their site and now I don't have to worry about damaging the camera lens. I'll post pics later, but it's safe to say that anyone looking to double their battery life should get one of these.