Trailer for Supermaxx to carry Akkus

[gusti]

Hi Guys
My son has a supermaxx. His playground for the maxx is a quarter mile away from our house.
For this reason, a trailer would be great to carry the batteries to the playfield.
It should be also very easy to attach and to detach this trailer very easy.
Have some of you made a trailer for a supermaxx?
If yes, please may you post any picture of this trailer please?

Thank you very much

Gusti