Well if you want to go to A123 packs anytime, HERE is a great link showing a DeWalt 36v pack being taken apart and made into other packs.
I just bought two of these packs as I am going to 7s2p pack and a Neu 1512/3D/F at 1700Kv., this pack is capable of 3000 watts.
“The modern astrophysical concept that ascribes the sun’s energy to thermonuclear reactions deep in the solar interior is contradicted by nearly every observable aspect of the sun.” —Ralph E. Juergens