There is no button to push on the battery buddy. It has a solenoid that disconnects the battery somewhere around 13V terminal voltage. If you push the brake pedal or flash the brights, it reconnects the battery. No wiring required, just connect it in series with the battery's positive cable. For those with lots of accessories, they all have some small amount of leakage current, amps, monitors, GPS and so on. My expy sits for 5-6 days at a time, so it needs a battery buddy. But as said before, having a dead battery in BFE National Park would not be a good thing. It also could save your battery's life. Running a lead-acid battery to dead reduces its life dramatically.
I will break down the benefits of one battery vs another when I get home from work(I teach all this stuff at school, so I can make it understandable.)