About two months ago the battery in my laptop was no longer recognized. No errors. The battery still charges and I can run for about 1 1/2 hours, but the battery shows as "Not Present" in the Power Meter. At first the Task Bar would show that I was still plugged in to AC power even after I had disconnected (it no longer does this). When I run on battery the battery light on the laptop glows orange, and I have no idea how much battery life I have. When I plug back in to AC power it doesn't show that it's charging the battery (yet it is). I'm running Windows XP SP3, and this is the original Dell battery.