I am having the exact same problem with my 2011 Liberty. I have had it in the shop six times in the last nine months, and so far the alternator and the battery have been replaced, and the problem continues. I just got it out of the shop yesterday, and this time they had a Chrysler Field Engineer there to look at it. The result...they disconnected the dealer installed aftermarket backup camera, and I am to drive it for a while and see if the problem has gone away....yeah right.
Here is the real kicker, I puchased this vehicle new in April of 2012, and it is not even a year old, and only has 5300 miles on it. I design electronics, and have told the dealership several times, that there is some sort of parasitic drain that periodically occurs when one or more of their systems does not shut down. They just keep checking the charging system, and the battery. I even connected a battery charger on one of the mornings that it was dead. The battery voltage read around 7V before connecting the charger, and I set the charger for 10 or 20 amps charge rate (can't remember which one), and let it sit for about 4 hours. Guess what, the battery voltage then measured UNDER 7V after charging for 4 hours, so the drain was still there. I have noticed that if the voltage drops in the 6v or lower range, the drain stops (sounds like a low voltage reset).
My Liberty has the following options:
Selec Trac 4x4, Navigation, Auto Climate Control, Remote Start, Backup Sensors, Tow Package, Sky Slider, and Backup Camera (aftermarket dealer installed at time of sale)
Don't know if any of those options are causing the problem, but thought I would list them.
If anyone has any ideas, I would really appreciate your thoughts.
Last edited by ZLIBERTY2011; 01-17-2013 at 08:36 AM.