I was one of those who, a year ago, senselessly replaced a top condition XK battery at no purpose, because I hadn't read “Ngarara” post, so I initially actually believed the "warning".

QUOTE: “The warning is misleading. It comes on any time the car has been in 'convenience' mode (i.e. all powered up & ready for lift off) for more than some fixed period like 5 or 10 minutes. “

Now, the world is full of ridiculous warnings to be ignored, but a more PRACTICAL issue:
I get this warning, and it then really switches off after 3 minutes, even if I ONLY activate the STEREO (no convenience mode).
With a top condition charged battery one would think that a stereo would run for days before that large battery is drained.
I have had vintage cars where that has been the case (forgot the stereo on, and it still runs days later).

=> Is there no way to be able to sit and listen to music in an XK for more than 3 minutes without the engine running ?

Thanks in advance.

 

I´ve read the whole thread, but keep back coming to that line.

A battery which is NINE years old? Throw out that junk, and keep the new battery on CTEK.

Hermann

 

Lol. This thread was started in Feb 2014.

 

.....and does anyone have an answer to the question:

=> Is there no way to be able to sit and listen to music in an XK for more than 3 minutes without the engine running ?

Or am I the one only one who thinks it is odd to have to bring a portable active speaker for the IPOD if ever wanting to have music without the engine running, when there is a fully charged 90Ah battery in the boot ?

 

With the draw on the battery from "convenience" mode, I don't see how you could.

 

Pretty sure that we all think that the battery draw thing is odd. I'd say half of the posts on this forum have to do with issues caused by partially discharged batteries. That being said, and several here would agree with me - I don't drive the XKR for the sound system, and might not even notice if it was gone, unless I was on a long road trip.

 

I found that getting an OBD2 Bi Directional code reader and resetting the Battery Management System solved all my battery woes. For some reason, the computer leaves some systems operational 24/7 if it doesn't get reset when the battery gets replaced or if an ODB2 device is disconnected in some sort of way.

 

I've never reset the BMS on my car while moving batteries around. I've left my OBD module plugged in for weeks before with zero ill effect. I have heard of some OBD modules causing weird problems, so maybe I'm lucky or got a good adapter.
Good thing you found the cure for your problem.

 

It would be worthwhile if some would actually read the description of the BMS in the Workshop manual. As it does not perform all that many think it does.
@Cee Jay , you are accurate, the BMS dynamically updates on its own. If you can't wait the short period, there is always the reset option.