Add this switch between your battery and Expansion Hub to have convenient on/off control of your robot. We recommend mounting the switch slightly recessed from the outside of your robot so that it's not accidentally turned off by another robot during a match. 
Specifications
Rated for >20A using a 12V battery
Terminals are Male XT30(1) Female XT30(1)
Panel mount in a rectangular hole 27.5mm x 10.6mm