Rob, I suspect you may be correct in that it seems AGM batteries may operate at higher charge rates and voltages than lead acid based systems, perhaps to allow for the extra loading of the stop start technology...? That perhaps being the case, given the extra expense of an AGM battery over a lead acid, those thinking an AGM might be a worthwhile upgrade over a lead acid might be best to just stick with lead acid...?
As an aside, both vehicles which we have and which have stop start technology do indeed operate as expected. I also suspect some vehicle battery`s suffered a lack of charge and discharge cycles during lockdown, and that perhaps additionall the Baby Boomer generation may be using their cars less frequently than they used to.. myself included and which may create issues for batteries..?
These days my modern fun car with it`s original 10 year old AGM battery, like my old Morgan, lives permanently connected to to an appropriately selected CTEK charger, though I have thoughts of replacing the 10 year old AGM as a preventative maintenance measure, in that after a period of 8 days off charge the car failed to start and the battery required charging.
While it is now permanently connected to the CTEK there is no issue, however if away from home in the car for a few days or more where the car may not be driven is unlikely to be driven or connected to a charger... Hmm..?
Last edited by Luddite; 31/03/22 09:49 AM. Reason: Duh..!
