Man I love the new battery! I noticed a big difference right away. I charged it for 8 hrs like it said, and am getting great results. Day 1 = 14 hrs of heavy use, Google maps, phone, surfing, and using apps without app killer. It also seems to charge a lot faster, and hasn't heated up at all. Day 2 = 16 hrs same use. I'm on day 3 now. I couldn't get the stock battery to last more than 4 hrs same use with the app killer. Just ordered another one for my wires Eris on Amazon $39 free shipping.