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It's going to be because it needs a complete circuit. (and firm contact with the handle where there will be another 'electrode'

This sounds exactly like (for example) electric shock gag pens and other things that attempt to emit a charge - A lot of electrical devices need a complete circuit- and so the circuit needs to be complete. For what this device is doing with moving ions, it probably needs the circuit- I don't know that the few devices out there that emit power without that sort of circuit could accomplish the same.




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