"Geoffrey S. Mendelson" wrote in message
...

stuff snipped

It wasn't until the second world war that the concept of standarization
across manufacturers was pushed. Companies made their own parts,
connectors,
etc, and tried to prevent competion.

It seems that the manufacturers of anything battery-powered haven't gotten
the message. I have two shelves full of nearly identical batteries and
nearly identical chargers that are totally incompatible.

--
Bobby G.