Forgive me for this, but I'm going to post a LONG URL. It's for Pocket Battery Analyzer over at Handango.
http://www.handango.com/PlatformProd...Search=Battery
You might give this a try first so you can get an idea of how well your battery is doing. Other than that, I'd hit up Toshiba every chance I got. They should hold to some sort of warranty, especially for a battery.