Battery woes

[F1 Nut]

I do a lot of short journeys and in 2 years, never had an issue.

When the car first went in to OPC, the technician came to speak to me about the battery voltage history being low, despite me not even mentioning it. My dash cam was set to turn off at a relatively low voltage reading, so I changed that setting. Not been mentioned by OPC since. It sounds as though you have a gremlin with the vast array of warnings/problems you’ve experienced rather than a common issue.

[SAC1]

Mine has gone up to 4 weeks without running and often it’s a 2 to 3 week gap. When it goes out the runs are always medium to long. Always starts easily on the first turn of the key and never had any problems with warnings etc. The only symptom – and it’s very minor – is that the stop/start system might not begin stopping the engine until I’ve done 200 miles of driving.

Likewise and mine is never garaged even in the winter.

[Cobnapint]

I do a lot of short journeys and in 2 years, never had an issue.

When the car first went in to OPC, the technician came to speak to me about the battery voltage history being low, despite me not even mentioning it. My dash cam was set to turn off at a relatively low voltage reading, so I changed that setting. Not been mentioned by OPC since. It sounds as though you have a gremlin with the vast array of warnings/problems you’ve experienced rather than a common issue.

It's been fine since it's session with the CTEK.
I've read other stories on other forums regarding spurious dashboard messages on Cayennes too and it turning out to be the battery.
The other half's 68 plate Fiesta had an issue last year. Although not a spurious alarm the car started to intermittently refuse to unlock the drivers door on the remote or key. It was locked shut, solid for several days with no way of opening it apart from potentially having to remove (destroy) the door card to gain access to the locking mechanism.
I booked it into the local main dealer asking them to quote for doing such a task but they said they'd have to check a couple of things first before going to that extreme.
They rang back saying there were no faults showing but that the battery had seen better days. Mmmm. Battery? Can't be, it's cranking the engine absolutely fine I thought.

I charged the battery up and the fault never repeated, but just so she wasn't left in the lurch again I fitted a new one. Been as good as gold since.