get a new mini stick battery? NiMh batteries are not only more durable, but have a higher mAh rating then shitty NiCAD batteries.
www.cheapbatterypacks.com
This site makes for great group orders, as it has free shipping over a certain amount.
I'd recommend the 1500 mAh ELITE cells, because they're awesome. Oh, and while you're at it, switch to deans connectors if you haven't already
