Protek Lipos, saddle packs or crawler packs
 

I have a pair of 2S 2000mAh 20C Protek Lipos for sale. These are just a shade longer than saddle packs, but with some creativity they work. They are really popular packs with the crawler crowd, though. They have 3 runs on them and Deans plugs. PM for price.
http://i293.photobucket.com/albums/m...s/DSC_0175.jpg