made a ring with a 2” long zinc rod that I drilled a 1/8” through, and a 2” copper tube, some latex tubing and I got my self a Tom Hubberts ring. I put warm water into the ring so that it runs through the ring. This I find causes .78v between the dissimilar metals, when it is warn around my balls and dick, I get tremendous morning erections.
I have two basic types, one consists of two pieces of dissimilar metals, and the other 4 pieces of metal. that is 2x1.5X3/8” copper tube and 2 X1.5x3/8” drilled zinc rod. With the both connected in an alternate mode, that is 1 zinc followed by 1 copper, another zinc and then the copper, all connected with 3/8” latex tubing. The result is a voltage of approx. 1.4 volts generated across the package, the voltage is serries aiding, .72+.72V. I find that if I wear both types of rings I get a much better erection and shoot larger loads. The wife thinks it’s bloody great.