My venerable IBM Thinkpad A20M has served me well over the years. It's still a reliable machine, and despite it's 700mhz processor, fairly zippy when the right software is installed. Sadly, the batter is toast. Years of abuse have left it with a life span of less than half an hour when using the wireless card. I've been thinking of getting a replacement battery, but buying a used one on ebay means I have a substantial risk of getting something that's just as worn out as what I have now. I've been researching other options for Laptop Batteries. Digital Camera Batteries are easy to come by, but Laptop batteries are a bit harder.
There are online directions for rebuilding your own laptop batteries, reconditioned batteries and external battery packs.
The question I now face is do I save up the cash for a new laptop, rebuild the batter pack myself or just order a used internal pack or a new external one.
This would all be easier if I had another digit on my salary.