my perfectly functioning laptop ran into trouble yesterday(dell 1520 inspiron).after using for a long time (pluged in),i observed the charge indicator was not showing an increase in charge.i felt this strange as the battery indicator was not lit up even when the charger was on and battery at a stubborn 26% charged.i thought restarting would fix the issue.but when i restarted,at boot time before the boot options were displayed(have both linux ubuntu and windows XP),it said something about battery not recognised press f3 to view msg again or f1 then f2 to continue.i never had this problem before.i was kind of shocked as i never had a battery problem and had a good 2 hour back up before the problem.anyone can help?