Remember Duracell’s PowerCheck? The idea was that a strip built into the battery would show if the battery was good or not. Sure, you could always get a meter or a dedicated battery tester &#…
You can do that with the 9 volt batteries and feel how much "tingle" they have, but never heard of it working with aa batteries. Wouldn't he have to stick the whole thing in his mouth to complete the circuit?
Yeah. Doesn't make any sense honestly. I think he thought he could power check it but didn't understand the actual mechanics of how it works. Glass onion eh.
I do this with AAs. Basically put the
side with the bump (positive) on the tip of the tongue and touch the flat (negative) side with a wet finger. It gives out a mild but distinctive 'taste', not enough to tingle but definitely something I am able to notice, when the cell has decent juice.