Michaeel C. HENRY
My switch is located in the trunk mounted in my battery box. I noticed I had ample room in the box, so it seemed like a good idea. So far it works just fine. What I don't understand is that you claim that your cooling fans come on which causes your battery to drain. My fans can run for a few hours on a good charge. I suspect your battery either needs replacing, the battery is low in H2O or your charging system is not sufficiently charging. Sometimes the short trips we take have the same effect. I purchased a trickle charger from my local auto parts store and keep it plugged in when the car is garaged. I always have a fully charged battery. I never use the cut-off switch.
You may also consider tying a scarf around your steering wheel to remind you to turn on the switch.