2-3 years? How old are you if I may ask? My N900 was 3 years old when I bought it. My previous phone is 8 years old and, although a bit battered, it is still running strong. I would not even consider an upgrade if it had WiFi and GPS. 2-3 years? Don't be ridiculous.

BTW my old phone (Palm Treo 600) used to run 10 days of average use (~1-2 hrs on-time a day) on a single charge. I did not use to take a charger with me when I went away for a week. I am currently using it only occasionally, to gradually copy contacts to my N900. So it spends most of the time on standby, but it never goes off (it only does when the battery runs out, which is rather undesirable as it also loses all data). BatteryGraph does not remember the last charge as it only remembers the last 28 days, but it says 31% left. I would love to see any modern phone pull that off.