This battery, or one slightly larger should work for you. The red plug you describe is probably a Dean's plug, which these batteries used to come with. I think they may have changed the connector due to a patent dispute. The white connector is for balancing.

http://www.hobbycity.com/hobbyking/s...0C_Lipoly_Pack

I have been using two of these packs, plus four larger ones, for two years with no decrease in performance.

Good luck