Yeah, I’m going to go with “No it doesn’t”. I’ve licked all over several vaginas in my life, and no part of any of them tasted even slightly like batteries.
Are you sure she isn’t sick? And she isn’t artificial? We’re not talking about the fleshlight here are we?
I’ve found an initial “tangy” taste (if she hasn’t just showered) that I attribute to the presence of lactic acid found in a healthy vajayjay. I could see it seeming battery-like.
Sometimes there’s a little whang to it initially, but comparing it to a battery is a bit of a stretch. I think there’s a hole in that theory.
I once heard a caller on the Dr. Dean Edell Show who had a compulsion to put ammonia on the counter and lick it. She said the taste and sensation reminded her of fellatio.