I had the same thing I changethe phone twicw and the battery three times before I gave up and exchange the N900 for a HTC HD2. I relly liked the N900 but 3 hours battery life is a joke, The HD2 with the same usuage last 11/2 to 2 days between charges. If i use the HD2 a lot i.e internet, calls, navigation and a few games then it lasts 8 hours.