WTB: aging TP600 battery to serve as UPS

[cure]

My slowly dying battery that served to get me from the upstairs plug to the downstairs plug without shutting off my laptop has finally stopped charging all together. I would rather not get a new or refurbished battery that I don't really need.

Thus I am looking for a battery 1) with little remaining life (say a minimum of 5 minutes), 2) for very little money, and 3) with very reasonable shipping either to Massachusetts or to Ontario, Canada.

Thanx.