I have 2 nunchuck intellect 1600 mah I can sell you if you want, but I really suggest you get these.
http://www.hobbyking.com/hobbyking/s...SOFT_Pack.html
That's what I use and they fit perfectly in my ICS handguard. They're lightweight and I never ran out of juice in a game. They are out of stock right now, but they'll probably get more in the next 2 weeks if you can wait.