[yash101]

Originally Posted by Jon Stratis

Batteries to do it are certainly not legal, per R34, unless they are integral to and part of the device (like a laptop battery).

As for "high-capacity supercapacitors"... As an inspector I would be very concerned with safety surrounding these. In college I had a roommate (bit of an idiot, failed out after freshman year, but that's another story) who had trouble with his sub woofer. Thinking he was a genius, he decided to open it up to try and fix it himself. He unplugged it, spent a few minutes getting the back off, and proceeded to get a sizable zap when the capacitors discharged into the screwdriver he stuck in there. So, I would be concerned with any sizable capacitor used for these types of purposes! If you're really concerned with shutting things down in a proper manor, have it respond to a signal from the cRio (or maybe the lack of a signal?).

That Sounds like Me