I thought someone said they were 35V, not for sure where, but if i find it i'll link it
edit:
http://rc-monster.com/forum/showthread.php?t=6349 Post #12 from zeropointbug
Work because i gotta, play because i wanna
People here hate Nitro, I love it. I start it, run it about 50 ft from me and it dies, I go after it. Perfect exercise