Seems like they may have fixed the low battery issues with the 2013 model. I left my 2013 X351 in the garage for 23 days when away on a trip unlocked to see what would happen.

When I first opened the drivers door, I thought the battery was dead. No lights and no dash activity. After a couple seconds, everything came to life. Started up fine with no low battery warning.

The 2013 model does have 2 batteries (one for the auto start stop feature). It also seemed like it went into a sleep mode, so maybe they changed the software.

Anyways, pretty happy that I don't have to worry about locking the doors or a battery conditioner (for now!)

 

I certainly hope that you are correct. But, when my 2012 XJL was new I could also leave it in the garage for close to 4 weeks without starting and had no issues. As time went on, the frequency of Low Battery Warnings increased, the time span shortened. Finally, a few weeks back, I would stop the car Friday night following a 150 miles drive and Monday morning I had the battery warning. The dealer changed my battery. As you know, batteries should last far more than 1 year.

While I was at the dealer, I opened the door to a 2014 F-type and, guess what: Low Battery Warning.

Edit: is the second battery in the 2013s similar size to the main one? That is an added 40lbs of weight otherwise not needed. I do not like that idea. Where is the second battery located?

Albert

 

I am, once again, less than thrilled with Jaguar. Just one short week after I got a new battery installed into my 1 year old XJL I got an other Low Battery Warning. That came after driving the car home from the dealer the previous Friday (150 miles), then taking the car for a 140 miles drive on Tuesday.

Car was locked as usual until starting it last night, Sunday, to back it out of the garage for a wash. Before the restart came the warning. Have to add that I have all interior lights turned off and had no electrical device turned on during the brief wash.

Albert

 

I never really took a good look at it, but both are in the trunk and one battery is smaller.... I think. If I get a chance, I'll try to post a pic.

 

The old XJ40 model of 1986 got a reputation that every time you got in and started the engine, it told you there was something wrong with the car. Lets hope the current XJ is different. Owners don't want all these warnings unless they really mean something.