Yaaaaaa.. Right!
*down*
I thought about that. What a great way to devalue diamonds. ;)
Given the tendency of technology to get smaller ... I'd imagine once they started creating batteries (for things like vehicles and satellites) they would quickly start shrinking in size.
Though if there was a chance of a conspiracy against it ... I'd imagine it would be by the battery companies. No more having to buy "C" cell batteries every year for your flashlight/camp lantern/etc. One battery would last well beyond your lifetime.