Quote Originally Posted by DarthEnderX View Post
Yeah, I'm guessing either he wasn't fully charged to begin with, or the giant lightning bolt he used at the start to attack Youpi drained a ton of energy. Which would make sense, given that more range with an electrical arc means more...amps? Or volts? One of those two.
More potential difference, I'd say. That is, volts.

As for the argument about his ability, Electrifying his Nen is what drains his Nen quickly. I assume that in the same way Killua changes Nen to electricity, he changes electricity into Nen when he recharges. That shouldn't heal him by default, but he could heal using enforcer abilities if he's good enough with it.

Whether or not he can gain significant usage time depends on whether Killua's got good endurance to begin with. If he didn't, then it could be worked on. If he's already above average in that regard, then I don't think it would help terribly much since that means the electrical inefficiency is the dominant factor.