On 14/12/2020 20:23, Andy Burns wrote:

Marland wrote:

on some vehicles with stop start, the condition of the battery and its
charging is monitoredÂ* by the electronics as the battery ages which is
why the stop start ceases to function when the battery has
deteriorated to a point that complete failure is imminent. To get the
best out of it the new battery has to be registered with the vehicle

My car is stop/start (I'm just about used to its foibles after a couple
of years)

The stop/start won't operate until the engine oil is up to temperature
(so less viscous) and the strain on the belt alternator/starter is lower.

It also won't operate when there's a very high load from all the
auxiliaries (aircon, heated seats, etc)

It does have a higher capacity battery than the equivalent
non-stop/start car, but it's not a *special* battery that would need to
be registered to the car.

Make/model ?? Just curious.