I've not messed with electric in 10 years, but there's some gooddeals to be had on 7.2V Ni-Mh packs.. You can find some 3000mAh packs for like20$.. I'd think that would be plenty to bash around with..If you want to race you'll prbablyhave to stepup to Lipo of somekind to keep up, but for having fun, I think the old 7.2v packs arefine! Also,here's the "Volcano" thread.. Should be able to find some good setups in there!
Volcano Support Thread Good Luck! (Note:the thread is 60+pages long, so might want to start at the end and work back, to find the most current topics.) Welcome to the forum!!