Yeah, unfortunately this tip is losing relevance as the technology is being replaced.
As an aside, I remember about twenty years ago or so you could buy disposable AA/AAA batteries that had a gauge telling you how full they were. They worked by squeezing the battery, which I believe created a circuit with your hand, which was enough to power a cheap LCD strip on the battery.
It never worked very well, the batteries basically said they were more full if you squeezed them harder. Back then it was easier and quicker to give them the drop test.
If there is necromancy afoot though, I’d suspect it might be at the world’s largest cemetery.