The ones in question I bought through Walmart online. I just received the Mitutoyo 500-752-20 calipers yesterday from Amazon. Thank you!🙂
Through Walmart or Amazon? Was the seller Amazon? Which are we talking about the 500-752-20, 500-196-30 or both? The -30 seems to be sold by every home and Gift...I would be suspicious too. It is not a typical home tool.
As for measuring the current, how does the battery attach? Is it accessible while in the device, or does it slide out in a tray?
Walmart, despite claims, does no vetting of its marketplace sellers. I can recount some horror stories a few years ago with a seller who is still on Walmart.
Edit2:
If Walmart, I would return and get a refund. I used "item different than described." I still got my money back eventually, but it was complicated. Others who fell for the scam simply said,"item not received." They got to keep the worthless "empty box," no questions asked and a refund. Of course, if item is different than described, then item was not received. I was too naive to take that route.