Excellent article found Ramuna, I've read it through. The reason I want to have more current available is: If I have not treated my hands for a few weeks, I have difficulty in conducting more than about 10mA. For some reason, as the treatment progresses, the current rises and needs to be turned down to a comfortable level. Most of the commercial machines instructions say that 20mA for feet and 15mA for hands. I wonder why conductivity of my hands are poor if not treated regularly?