About 9 volt battery tapping

I found this vid on youtube:

http://www.youtube.com/watch?v=yet2WBbcJh8


and was wondering how the effectiveness of tapping compares to a full zapper or (I know the difference is probably huge here...) Rife machine? And why does he use a cloth? I understand the purpose of increasing conductivity with water - what would happen if one were to simply tap a 9 volt battery on their body about 10 times a second (10hz) in perhaps six or seven minute bursts? To what extent is this hindered by the low frequency and conductivity onto dry skin?

Thanks ^_^


Mike!