They have a new "startup" cable which AFAIK was brought out cos the Thunder can be a bitch to start sometimes on a non-cheyenne psu.
Even at 12v if you have the needle hang set a long way out it wont start. It does try though so I wonder if that can damage the motor.

But I've run a hawk on a cx2 for over a year with no issues and without having to start off at 12v