Well Ihave had 3 different N80's now and the battery life has varied on each one of them. i think on average before new firmware my battery would have lasted a day like yours, but now with new firmware my battery lasts a good 5 days without use, 3 days with general use but I use my N80 for so many things throughout the day, Mp3 player, Wifi, email, calls, texts. So i get about 2 days from a full charge.