1800V is certainly not "weak"! It depends, though, on the physiological effect you are trying to achieve. 1800V (at low current) may not "stun" a person, but it definitely hurts ALOT :twisted: (I have had it done to me, several times, when I least expect it!).description says that voltage steps up to about 1800v. This is pretty weak compared to most stun guns that run 50,000 to 100,000v.