Ice Blue, I experienced this on my H9 Cap 33% with 2 6V NiMH 3300 MaH packs, not fun! I purchased and installed a Electrodynamic EDR-111 optical isolator http://www.electrodynam.com/cgi-loca...6df+1128450034 and cured ALL the problems. Servos are much stronger and faster and no throttle fail safe situations at all, it is rock solid and the optical isolation adds more safety from radio interference.