I've had the AGM in my MY2011 since new. Not had any battery problems to date.
But do AGMs eventually die like lead acid batteries, or do they go on and on and on......[/b]

I've had a few optimas. They just stop with no warning. 2010 Overfinch 3.6 V8 FFRR gone yee haa
2005 Supercharged 4.2 V8 FFRR (written off)
2007 RRSport v8 3.6
1996 300tdi Disco 1

Ive replaced a few now but NO where near as many as the old type... So, seams to be a vast improvement

Are AGM batteries only for cars with Stop/Start tech? Dave

2012 Vogue Westminster 4.4

No, a lot of the later diesel L322's had them from the factory.

Sorry to be a thicko, but what benefit does an AGM battery give over "normal" ? When you say "not had any battery problems to date", do you still get "HDC Inactive" if you leave the car for a few days ?

You only get that on pre 07my cars Biffo 👍

Oh

Was hoping an AGM battery was the answer

AGM is more aimed at leisure batteries. Instead of wet acid and lead plates it is made up of fibreglass mat which absorbs a gel version of the acid.

The advantages are that they can take a much deeper discharge and still come back to 100% from it. Also they can do this many more times than wet batteries before they fail. This is the main reason LR fitted them to the later L322s, to provide power for the fuel burning heater and still have enough to start the car.

As long as the CCA and AH values are similar the AGM is a much better technology. It tends to hold a higher voltage under cranking as well which is usually the cause of HDC errors etc on startup.

Thanks for the explanation wish I'd been up to speed on this before I bought my battery a month or so ago Every day is a school day with my FFRR....