Graphene Production, Capacitor Production and Testing in a kids toy...
Here's how the graphene is made. Pure graphite powder goes in to a ball mill along with half a dozen, 1/4", ceramic balls. I run it in the ball mill dry, for about a day. Then I add purified water and a little bit of a surfactant. Then the ball mill runs for another 5-6 days. The mixture is left to sit while the graphene floats to the top after which it is skimmed off and then applied to a strip of a nonconductive film and allowed to dry. Water and surfactant amounts are a bit of a trade secret.
These capacitors are not the prototype of the manufacturer that they allowed me to buy. They are a prototype, partially created by myself that I am paying the company to manufacture.
If anyone thinks a child's toy is a poor platform to use to test a batteries endurance, think about it this way. Children's toys aren't made to be energy efficient. They drain batteries quickly and the toy manufacturer probably has some sort of an agreement with battery manufacturers saying, "Give us a cut and we'll make sure people have to buy lots and lots of batteries." On top of that, it also gives the battery a chance to take the physical abuse of a 1 year old throwing the toy around.