OK just to let you all know, I do know a little bit about electricity. I started fixing radios and TV’s at 14 and I recently retired from a major distribution transformer manufacturer as the supervisor of their QA and testing department at the three phase plant. Along the way I graduated from the Navy’s top electronics school, before it was discontinued because it taught too much. I also taught at the Navy’s top electronics school, the one that replaced the one I graduated from. I’ve worked on the most powerful airborne radar ever made.
I’ve been bit by a lot of different voltages, both AC and DC. The worse was from a coil that discharged through my body at an estimated 150kV. I don’t know if it was that high for sure, but it did knock me out, in fact, I came to laying on the floor behind the chair I was sitting in, and the chair was not knocked over, that one hurt for days afterward.
I’ve done the safety lectures, I’ve done the skin resistance measurements, wet and dry. I will say that those who felt something from a 12 volt battery did indeed feel something, I just don’t know what. I have handled a lot of 12, 18 24 and some 28 volt batteries and never felt anything, including when working on the flight deck in the tropics where the humidity is 100% and salty at that.