I fully charged mine after I got it yesterday. Then on to importing contacts, transferring 2 gigs of music, playing some songs, importing a few megs of photos, syncing 3 email accounts, a load of texts, 6 phone calls and downloaded lots of apps in a mixture of 3G and wi-fi. That was about 6 hours worth. I put it back on the charge for overnight at about 50 percent. I'm new to droid, so I was probably pushing buttons and opening up things more than once while I learn. I'm happy with the battery, but expected no less as it is brand new. My Black berry battery would have played out completely doing that stuff. One point though is that the music transfer from my lap top was done with USB, so I assume it may have been given a little boost to the battery instead of a drain.