The reason I ask is My Pc is being used by my Gf at the mo and I can't get into it to check what type. I have a new fan Coming Wed for my Graffix Card and was going to change the battery at the same time. Now if I unplug my pc to check I'll need to re-do my bios then on Wed do it again. If anyone could tell me what type of batter to get I would be most Gratefull as it would save so much hassle. , it's in a Unit connected to my surround sound etc. Thanks, Charly.