So I'm planning on fixing up an old ThinkPad X41 that I've had in my collection for the longest time (all it needs is a new internal disk drive, and CMOS battery), and I'd like to replace the main battery, which is dead. Are there any suggestions for places to buy them? Google searches turn up a who...

To make a long story short, I scored an A21m and an A22m for cheap ($6!) with a whole box of batteries and power adapters. My aim was to install a lightweight linux distro but everything I've tried so far simply hasn't worked. From what I've read, newer versions of lighter Ubuntu variants won't work...