I was getting sick of charging my phone everyday or having it just turn off during a long conversation. With this new battery i bought, the first time i charged it, it lasted a week. I was amazed. It was a big difference from the standard battery. Sure it makes it a little bulkier, but the Razr is so small to begin with, its still smaller than most phones even with the extended battery. I am not sure if they make custom cases for the Razr with this extended battery, but i just keep it in my pocket(away from my car keys) and that is the safest place it can be.