So anyone here ever make their own battery pack for a laptop? I've seen a couple sites where people have done this, for both Macs and PCs, and was curious. I'm a pretty fair hand with a soldering iron and a dremel, so I might give it a go sometime, if I can find a cheap dead donor battery (something that is recongnized by the computer but only holds a minute or two of charge). It looks like a lot of these packs are made up of battery cells that are fairly common sizes, and it's just a matter of getting the right number of the correct sized batteries then soldering them in place. So any success, or horror, stories of someone rejuvinating an old laptop with a new hand built battery?