After only a few months of usage my Motorola Q could not stay alive for more than 6 hours, and that was without much use. With heavy usage I needed to recharge it at least twice a day. This battery is a little bigger in size and comes with a replacement door. However, it has better capacity than the original battery that came with Q. I now charge my phone only once a day or every other day. This is a must to have for all Q owners.