If the skin is punctured then yes of course it would hurt a lot. But with sweat/saltwater? I’m no expert, but I highly doubt it. I remember helping a friend out with his boat (also 12v) during a hot summer, and I was holding onto the battery terminals with really sweaty hands. It was just a tingle.

I don’t have a particular scene, but a here’s a funny conversation I had with an acquaintance:

Huh, this thing takes just 12 volts. Could run it in a car.

Wait, a car’s electricals are just 12 volts?

Yeah. The battery and most wiring around a car is 12 volts.

Wait… then what about those scenes in movies where they torture people with car batteries?

Yeah, those are fake.

looking into the distance as the realization dawns on him Those movie directors deserve jail time.