That's right, it goes straitght to the battery. "Both the negative and the positive battery connections are fitted with a ring terminal. This will allow them to be bolted to the battery terminals".
I guess you need the controller to bring the temperature up and down to your liking, othrwise it would be only "on-off", right?
The other use for the controller is that I wouldn't need to install a relay or splice wires. The selling point of this product is that it installs easily, and anyone can do it.
The whole package is
$79.99 plus taxes at
http://aviciouscycle.ca/Mainpages/productpage.aspx?productid=6921 (plus shipping, if you do not want to drive there).
Because I don't have heated grips or gloves... I'm thinking I would start with the grips, just because they are cheaper ($80 vs. $300 Velocity gloves). If it is not enough, then I may save for the gloves.
Does my logic make sense? I need to extend my riding season a little bit.