Battery kill switch

Hey,
 
Just wondering if anyone has installed a battery kill switch?
 
This is due to my laziness more than anything. My MR2 is lucky to be driven 2 or 3 times a year and I am currently trying to build a custom mount for my AVCR and gauges.
 
I'm going to put a few triggers for things like my IC fan as well on it.
 
I'm now thinking I might put a kill switch for the battery, save me popping the hood and disconnecting it every time I park it up.
 
Just wondering if anyone has done anything similar and has any insight for me?
 
Thanks,