Can I use it to play pokémon go please?,(reply>), We use a transformator!,(reply>), It's a battery, not a capacitor.  It's unlikely it'd dump much amperage, and high voltage in the absence of high amperage is harmless.  (As is high amperage in the absence of high voltage.),(reply>), That's what the bell uses, but if you make it run through your body, it would be worse than AC 220V.,(reply>), @Jan Sten Adámek<br>It wouldn't kill you. 2kV * 1nA = 2μW, you won't even feel that.,(reply>), Does your phone run on 2000 volts @ 1 nanoamp?