Had my AC serviced today dealer had to replace the Schrader valve as it was leaking they did a fine job and the AC is plenty cold now.

ANYWAY I also inquired about having an AUX battery installed and pointed out to the service writer that surely they must have something as there is a tray for it, He said he would check into it, well the story is NO there is no factory AUX battery kit, the extra tray is there because of the diesel engine option. He said that the AUX battery setup is possible but it would have to be done with an aftermarket kit.