It's not a problem unique to…
It's not a problem unique to EVs, modern 12 volt batteries are awful, I change so many batteries that have good cranking amps but won't achieve the very high charge percentage required for stop start etc.. some of them less than 2 years old. I have an old Mondeo work car with the same lead acid battery fitted that it left the factory with 23 years ago.One of the drawbacks to removing lead is that the substitutes are very poor,AGM, flooded,gel silver calcium............,all rubbish!