its about a year old
i have two batteries, both are original

the strange thing is i can continue to use to the phone for quite a while after the sudden drop to 0%

also using the command "lshal | grep perc" in terminal gives me two lines

one that says battery.charge.level.percentage = 0
another says battery.charge.level.percentage = 20



i found that lshal | grep perc command from this thread btw
http://talk.maemo.org/showthread.php?t=54429