I charge my n800 every 3 days or so and I really use it a lot. When at home n800 is always connected with skype opened. To get the best out of the n800 battery its best to charge it until it displays its full and then deplete the battery atleast a couple of times and recharge to the fullest again! Try not to charge overnight since it charges pretty fast even if its charging with the unit ON. Leaving it plugged in all night might result in overcharging it and that kills battery life! I get about 7 hours of use with a 30 minutes of browsing every now and then but mostly mauku,pidgin,email.