I have a Inspiron E1505. Nice laptop for my needs but I tried to do a bios update to it and it says The AC adapter must be plugged in. It is of course so I check the power utility in Windows it says the battery is not present even though it is. Checked the bios and it says no battery present. Could this be due to the AC adapter pluggin on the board since it feels loose to me or the actual Battery. The AC Adapter reads out perfect on my multi-meter.