Can you let us know roughly how long the battery lasts from full charge under reasonable use? Also how many cycles of charging it has been through?
Sometimes the computer battery monitoring software loses track of how much juice is left, and if you don't 're-teach' it what the extremes of capacity are, then it will close down the computer whilst there's still charge left. :a
The easiest thing to do to correct this is as follows:
- Go to the 'power options' in the Windows control panel
- Change each of the 'Running on batteries' drop-downs (ie monitor, hard disk, standby, hibernate) to "Never".
- Go to the 'Alarms' tab and untick 'low battery alarm' and 'critical battery alarm'.
- Then turn up the screen brightness to deliberately use battery power and wait for the battery to allegedly 'run out' and the computer close down.
- Then wait.... and restart it again.
- Then wait for power to run out again.
Finally, plug in the power and restart straight away under the mains power. The system should then begin to monitor battery charging process (and thus capacity) from a more realistic baseline.
While it's charging:
- Go back to the 'Power Options' in Control panel and reset the drop-downs (I use 5, 5, 10, and 15 mins for monitor, hard disk, standby, and hibernate; respectively).
- Go to the 'Alarms' tab and tick them both, choosing 10% and 3% for 'Low level' and 'Critical' alarms respectively.
- Turn down the screen brightness again with the usual Dell blue key combination FN + the cogwheel (up triangle)
This may get you a bit more life out of the battery; it's worked for me a few times on different machines.
Finally, as also suggested by alex thyl, consider turning off the internet (right-click -> Disable) if you are not using it for a while. It definitely drinks the juice. :iagree: