That much capacity to absorb and hold a charge over a short period of time, also indicates that there would be the capacity to DISCHARGE that electron load just as quickly as it could be put in.
And a rapid discharge of electricity always involves heat, so how is the discharge to be throttled back to useful levels so the wiring does not burst into spitting arcs and open flame? (I know, I know, that is why Doc Brown invented the Flux Capacitor, which makes time travel possible.)
We may have fusion energy before that problem is solved.
Ohm’s law applies regardless of the power source. At any given voltage, the load will draw the same current whether it’s from a capacitor, a battery or the power grid. The main problem with capacitors is that they pack a huge wallop when they’re shorted out.
Should be fairly easy...bundle the device with a discharge circuit that will slowly eke out the desired voltage.
Maybe a future high energy weapon here? Light, easy to carry and very deadly?