Board Thread:Off-topic discussion/@comment-26887977-20180720000448/@comment-27306930-20180720203853

@Mojo: Yes, the nominal voltage on a 3S is 11.1 volts, which is only 2 volts higher than the stock 9 volt battery pack. I have done it many times with IMR packs, and I've seen videos where people ran 24 volts with stock wiring. I'm not saying it's a good idea, but these Vulcans are tough old birds.

@Pedroh: Was it an instantaneous loud POP ? Is it possible the power pack was 9 VAC ? If you run AC through these DC motors it can burn out the commutator. The armature will vibrate back and forth on the same coil and eventually burn it out.