Over the weekend my battery was pretty good until I started playing with google maps. I accidently turned privacy on to lattitude and my battery was draining even though GPS was off. Lattitude will find you through tower location whcih uses cellular power! Much better this morning when I turned this feature off. In fact google sent me an email letting me know I forgot to turn it off. Thank god Im not a convict eh! PS- feel free to merge with battery threads if need be.