Hello Guys,
Did you check out the new Irate lipolly cells they are supposed to be rated at a 10c discharge. And the biggest cell is 2600 ma I think. So maybe you can use less cels.
cheapbatterypacks.com has them.
There is also tanicpacs.com that sel the same lipolly cels in pacs, under a different name.
Check them out. I havent done the math so I don't know if they would be lighter then the TP packs, but it sounds as if they would be.
A 3p pack of the above mentioned cells should give you about 78 amps dicharge vs 48 amps for the TP You could even go to a 2p pack and still have 52 amps available.
I'm in not selling these cels, I'm also starting to get intersted in this electrical stuff, and have been doing some research.

John Salas