I have had to become proficient in battery technologies in needing to select the correct battery for my products.

XK lifestyle= infrequent usage= greater discharge than charge- namely due to extensive electronics and greater crank amp demand, so former Jags are different animals.

Speed and rate of charging is not function of the charger rather the batteries chemistry, i.e ability to absorb the charge, i.e resistance.

You cant kill an AGM battery because its warranted for 5 years and more. In other words, it will always be under warranty.

No, warranty on batteries is no joke! ask Samsung or Apple. There are no loopholes. If you get a 5 year replacement battery it means they have to standby it. Also ask Jaguar they were sued for their battery system.

Others here will tell you that flooded batteries corrode. Its the blue and white powder you see on the terminals.

 

Perhaps the corrosion on lead acid batteries is less or non-existent in air conditioned spaces such as the cabin of a car??

However I have destroyed plenty of remotes and other electronics in the home where the battery corroded and leaked.

 

 

Q&C you must have finally replaced the batteries in my parents tv remote.

 

Interesting thread. I recently replaced my battery with an AGM from advanced auto parts and my original was Flooded. I’ve had issues with weaker than normal starts and start-up gauge twitching… wondering now if it has to do with this TSB.

Loth

 

Since Lothar resurrected this thread, let me build on it.
- Is it true that AGM batteries are not vented?
- If your car has a battery vent tube, does that mean it was originally designed for a flooded, non AGM battery?

 

To muddy the waters guys, many XKs have replaced their batteries with a larger group 48 model battery. Correct me if I am wrong!
My hypothesis is that such a move makes, the alternator "somewhat too small" for the larger size battery. Flooded or AGM. So keep a maintainer nearby, and use it when needed.

 

Depends on the AGM battery. Some do, some don’t. If it has a vent hole, use it (may have two holes, in which case the unused hole should be plugged). AGMs are less likely to vent gas, but since our battery location is in an enclosed space, better safe than sorry, use the vent.

 

I was looking for a method to determine if the car originally had flooded or AGM battery. I didn’t realize some AGMs have the vent.

is there any other method to determine if a car was originally designed for a flooded or AGM battery?

 

I did't realize they were vented either but hey, learn something new every day. GGG once wrote that, in conversation with someone @ JLR (or Dealership), the AGM batteries were fitted on the start/stop models. Maybe he can confirm for you but that works for me.

 

@XKDreams , yes.
Look at the appropriate workshop manual for your vin. The specified battery will be listed there under “Battery / Specifications”.
If you cannot locate the appropriate workshop manual, the Jaguar parts counter can look up these specs for you. Those lookups are also based on vin.
Cheers.

 

Yep, absolutely no doubt that when JLR went to start/stop in 2012 (or in 2011 for MY 2012 cars) they also switched from flooded cell lead acid batteries to AGM batteries (still lead acid just not flooded cell).
Originally the S/S system had two batteries, a big one and a smaller "auxiliary" one both AGM, then around 2016 they switched to a single battery system.

 

@OzXFR , I have the 2 battery solution in the LR4. It works perfectly. And I think the engineering is sound; use the aux battery for monitoring while engine and charging are off. Reserve the “big” battery for the “start” operation.

I have wondered why this good solution needed to change to the single battery approach.
Cheers.

 

I read somewhere that the single battery S/S system has a large capacitor built into the battery which effectively took over the operation of the previous auxiliary battery.
Gotta be cheaper than two batteries and less prone to breaking down or either battery going flat.
Either way doesn't bother me in the slightest as the F-Type is the first and only car I haver ever owned with S/S and the very first thing I did when I got the car home (nearly eight years ago now) was to permanently disable the damnable thing!

 

And that is where will have to agree, to disagree.
I don’t think of S/S as a means to save fuel. I think of it as a means to reduce hydrocarbons when running is not necessary.
And I’m all about that. Thus my attraction/addiction to gliders and sailboats.

Cheers.

 

I am enjoying this thread. I have a 2021 and a 2015 BMW 3 series and when changing the battery one has to reprogram the battery monitoring system with a special scanning tool. This allows one to specify the type of battery (useful if one switches from conventional lead acid to AGM, etc) and the CCA rating of the battery. I have read that Jaguar has a similar scheme for their late model cars, including the XK. I think that this allows one to use either type of battery.