Graphene batteries for sale anywhere?

I remember in my class a student gave a speech about very small graphene batteries being available for $500.

It would be interesting to try out this new battery for my robot although does anyone know if they are even available?

I haven't exactly found much on google besides articles.

VorPower seems to have them for sale
http://store.vorbeck.com/collections/vor-power-flexible-battery-straps/products/vor-power-athena