Remove battery for long term storage?

What happens to the various “brains” in the electrical system if I remove the battery for an extended period (3-4 months)? Which systems would have to be resuscitated? I know the clock would have to be reset, but what else goes stupid? Better to leave it connected to the car with a battery minder/tender plugged in, or remove it and use a minder/tender on the bench? I ask because I’m always suspicious of these electronic gizmos (tenders/minders) going crazy and damaging more than just the battery.

They are fine disconnected.

Just bass, treble and radio code required.

CTEK are good for keeping charged though.


Both times our ex 308 had the battery disconnected for several weeks (or months) it resulted in a ”bus error” that required a workshop to put it back in order. There was nothing wrong, but the car would remain in limp mode. After the 2nd time I would just keep the battery connected with a CTEK, much cheaper and easier that way. Cheers!

That’s the sort of thing that gives me the heebie jeebies. I was reading related archives on the other Jaguar forum yesterday , and there’s also reference to glitches with the door lock/security system. Worst that could happen with a monitor/tender meltdown is the car burns down…better than dealing with computer phantoms…

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If the car is disconnected when the doors are locked it remembers this state and therefore when battery is reconnected the alarm will sound if trunk open.

I therefore override the boot latch, manually locking it. And put the key where the hook should be so I don’t forget and slam the boot