I'm not sure I am 100% with the idea but I have lived long enough to say...
"ya don't know what ya don't know". ;-)
However, I have to say, I don't get how magnets can do it BUTTT I am not an engineer (or whoever it takes to figure it out ;-) ) However, I have a friend that is an engineer, so I will ask him what he thinks.
As a side note... with all the EV car thing going on, he told me long ago that the problem with EV is that the battery can't be recycled like the standard lead battery can be recycled. So, with that being said, I will be interested in what he has to say about the magnet idea.
I will be doing my own research later but you have given me a great start.
Cheers and thanks for all your information.