When I got my s5 last week I could not believe how horrible the battery life was. I don't watch videos, don't play much music, and the phone was going down to 60-70% within 3 hours after full charge. So I ordered the ZeroLemon "Brick." I'm only on day 2 but I can say I'm 100% satisfied so far. 10 hours into the day and I'm over 90% still and I haven't done the full 6 charges yet that ZL recommends. I suspect once the 6 charges are done It will last even longer. I was worried about the bulk because this is a HUGE battery, but the case is very solid and feels perfect in my hand. The phone isn't slippery anymore and just feels really solid now. If I have any problems with this new battery I'll come back and post. Anyone else have this battery?