Joe Romas wrote:
I think the recall was "F-45" for the battery discharge. It was for the BCM leaving something turned on

Correct. Can't remember The TSB or recall number, but it did concern a problem with the BCM (Body Control Module) draining down the battery.
For a quick and dirty, but not always accurate, check you can go to the Jeep website. On one page, you can put in the last 8 digits of your VIN number and see of there are any recalls outstanding on your vehicle.
And there are various websites you can go to get a summation of all the TSB's/recalls that apply to the Liberty.
As far as the battery disconnect switch - believe it or not, a feature similar to this is built into the drivers side dash fuse panel (one of the things that DC did get right). There are two sets of fuses in special holders such that you can easily disconnect them without the fuse puller tool and leave them sitting in place. Owners manual lists which of these sets of fuses to disconnect if the vehicle is going to be idle for more than XX number of days, to prevent killing the battery.