This is the one I use ATM, in both my JQ buggy & my brothers JQ buggy, been good so far with no issues & they last a while.
http://www.hobbyking.com/hobbyking/s...iver_Pack.html
This is another one I was using before changing battery box, now I use it in my MT-4.
http://www.hobbyking.com/hobbyking/s...ver_Pack_.html