XKR downtime
Veteran Member
Joined: Jan 2010
Posts: 2,941
Likes: 1,511
From: New Zealand
As you have discovered, unless there is a non-standard drain on the battery, 2 1/2 weeks is fine to leave the XK for without a maintainer.
I personally only ever use one if I have been doing work on the car or giving it a decent spring clean with all of the doors and boot open otherwise I just lock and leave.
I am heading to Europe for 3 weeks later in the year and will be happy to leave the XKR 'unmaintained'. My Aston is a different story though as it does seem to genuinely have an issue. I had the tracker disabled and disconnected a few weeks ago and that has improved things but, even though the battery is reasonably new, the voltage had dropped to 12.4V after 5 days so I have resigned myself to having to use a maintainer if I won't be driving it for 3 or 4 days.
I personally only ever use one if I have been doing work on the car or giving it a decent spring clean with all of the doors and boot open otherwise I just lock and leave.
I am heading to Europe for 3 weeks later in the year and will be happy to leave the XKR 'unmaintained'. My Aston is a different story though as it does seem to genuinely have an issue. I had the tracker disabled and disconnected a few weeks ago and that has improved things but, even though the battery is reasonably new, the voltage had dropped to 12.4V after 5 days so I have resigned myself to having to use a maintainer if I won't be driving it for 3 or 4 days.
Veteran Member
Joined: Apr 2008
Posts: 3,622
Likes: 1,640
From: Ottawa, Ontario, Canada
I concur.
A good battery today is quite resilient to “drain” by sitting. Its the “draw” on the good battery that depletes them.
You can reduce the draw. I have posted the specs concerning draw, before.
A bad battery, a different story.
As I keep her in the garage, I do not lock her. The result, she can sit for 6 months without needing a charge. Coincidentally, so can my boat.
A good battery today is quite resilient to “drain” by sitting. Its the “draw” on the good battery that depletes them.
You can reduce the draw. I have posted the specs concerning draw, before.
A bad battery, a different story.
As I keep her in the garage, I do not lock her. The result, she can sit for 6 months without needing a charge. Coincidentally, so can my boat.
Last edited by guy; Mar 29, 2023 at 05:40 AM.
Senior Member
Joined: Feb 2021
Posts: 822
Likes: 279
From: Sacramento CA
I charged my one year old AGM battery (880 ccv) to a max of 12.9. Disconnected the battery and let it sit. After 2 weeks, voltage (using a very accurate DVOM) was 12.8
My "storage shed XK8 " doesn't get much use since I bought my 07 XKR. Actually no use. If I leave the battery connected (and locks double clicked), it drains quickly. Disconnected, no problems letting it sit.
My "storage shed XK8 " doesn't get much use since I bought my 07 XKR. Actually no use. If I leave the battery connected (and locks double clicked), it drains quickly. Disconnected, no problems letting it sit.
Veteran Member
Joined: Aug 2010
Posts: 10,104
Likes: 7,105
From: Atlanta suburbs
In the UK and other markets where it's available, double-locking prevents a thief who breaks the window glass from opening the door with the inside handle.
NHTSA values life more than property.
See:
https://www.jaguarforums.com/forum/x...-alarm-230706/
https://www.jaguarforums.com/forum/x...ocking-234198/
https://www.jaguarforums.com/forum/x...estion-222834/
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