MMMmmm. So I shouldn't rev up our remaining petrol car to 3-4k for a few minutes then?
I've read that just starting a car is likely to take quite a chunk out of the battery, so not worth pussying around. Ideally it's best not to start a car if you're not going to drive it. However recently cars are often idle for a while, so things can go wrong. In normal times a petrol car would probably be driven at least once a week, and should go for at least 4 miles or so to keep the battery charged - ideally more and at reasonably high speeds - which also gets oil around the engine, stops the carbon from building up, and the driving probably gets rust off the brakes and loosens the suspension, and frees up the sterring a bit etc. AFAIK it's not a good idea to leave a car idle for a long while.
Clearly these are not normal times, and with our EVs we don't tend to drive the petrol Peugeot as much as we did before, so that's not so good for the poor thing. So sometimes I do rev it up to 3000 rpm on the drive for 2 or 3 minutes just to check that it's working OK.
Is that a bad idea?