This may be of interest to members who have been experiencing battery problems. This is my experience with my XK and my readings may not necessarily be the same for anyone else. BTW the CTEK I use will only maintain the battery at 13.6v.

 

Jaguars seem to suck a lot of wattless current.
Leedsman stated that battery damage can be ameliorated by a capacitor, but this remedy was discussed controversially.
https://www.jaguarforums.com/forum/s...e8/#post338579

Available at Amazo (suited for stereo equipment):

US: Robot Check

UK : Amazon.co.uk: capacitor farad

Buy one with no more than 1 plus and 1 minus terminal that includes a charging automation circuit.

 

What was this video showing? with no comments on the video it seemed pretty normal.

 

The original video on YouTube does show all my comments with a time line at the voltage changes. I'm not sure why they dont appear when using the link.

 

12.6 is fine. Make sure the pigtail has positive at the battery, and negative to chassis, NOT BATTERY or else you'll mess up the battery monitor programming.