Battery percentage during long term parking

[AndyEag]

We are shortly going to leave our MG4 in an airport long term car park for 3 weeks. It will probably be sitting at about 60% battery when we park up. What sort of % loss can we expect?
Andy

 

[Ian Key]

0% loss.

Just check the 12v battery terminals are tight and is showing a reasonable charge as some have come back from holiday and found it hasn't got enough power left to open the car never mind starting the start up sequence.

Some of us keep a 12v lithium jump starter in the glovebox just in case so we can open the driver's door with the emergency key and pop the bonnet to attach it.

 

[Kithmo]

There should be no loss on the HV battery in 3 weeks.
Theoretically there should be none (or not enough to cause a problem) on the 12v either, but some have had problems with weak 12v batteries.
As @Ian Key says above get yourself a jump starter just in case.

 

[Buster72]

We parked at Southampton for just over 2 weeks with zero loss of battery charge of either 12v or main battery.

 

[tsedge]

I would think you'll be fine in summer, in the depths of winter you might want a backup for the 12V battery.

 

[AndyEag]

Thanks folks, just what I had hoped for.
Andy

 

[Torryhun]

Thanks folks, just what I had hoped for.
Andy

You should be totally fine if you've had no 12v problems in the past, just try and avoid checking the status of the car while away as this may have a detrimental effect on the 12v battery.