i saw someone post it and tried it, and .....wow. i have a spare battery and charger, (from d1 thank got its same battery ,lol)so i never really care about the battery , but it made it almost a full day and a half with heavy use, im talking i played a 4 and a half hour tournament on UB.net tethered to d2. while listening to the music player. screen was off, but only barely touched batt life. im just now about to swap batteries. so try it before u answer the poll please.