Today I dropped off four batteries for my work laptop to BatteryRefill.com (they're in Ontario) because I didn't have too much time, but I was wondering if anyone had done it themselves.
Googling, I found this and other sites like it (which isn't that much cheaper than a site like Battery Refill)
http://gizmodo.com/gadgets/laptops/diy-refill-your-own-laptop-batteries-241096.php
