Hi, and welcome! Glad you found the forum, there's more info and great people here than you could possibly imagine.
Unfortunately, your multimeter help will not come from me because I'm multimeter-......ed still. Bought one one Amazon, and it was DOA so never learned a thing about then. But I've never heard of ANY
device managing to vape at 8.46v, and I imagine that if it happened it would fry your atty like a christmas turkey so my money's on a bad reading on the multimeter.
WELCOME TO ECF!