Originally posted by BaxterC
I would rather put in the stickpacks, but they are expensive,
Try
www.cheapbatterypacks.com
Even 6 cell (SC, Sub-C size) matched GP 3300mAh packs sell for only $35 there, but cheaper cells will do just fine in a starterbox. I bought four 3000mAh packs there once for only $20 each via eBay!