Not sure what the problem is, but I can't seem to get my Compaq laptop to charge the battery! I leave it plugged in overnight and turn it on in the morning only to see the battery meter very low, and it shuts off soon after that. I didn't use it for about 2 months, it worked fine before that would hold a charge for 30 - 45 minutes. It might be a short, I plug it in to charge and the battery charge light comes on, then shortly after that it goes off! I bought this thing off ebay for the sole purpose of running direct scan and I don't know what kind of DC adapter to buy either! Anybody know what's going on? Or should I just buy another laptop????