That what does the killing--the 9 volt battery, so your questioning is irrelevant--if it kills in water (which we are quite a lot of), it kills in us and a jar of water
Have you ever heard of in vitro vs. in situ?
This statement you made is so inane as to be beyond criticism. Anyone who would take your information seriously deserves the outcome.
If she weighs the same as a witch she's a witch logic.