Good resource.
Modern cars are much harder on batteries that the old days. Everything is controlled and dependent on getting good 12V and solid Amperage.
Those of us with iStop get to pay extra for EFB batteries or in some countries AGM’s. Oh goody!
A mate who is a retired mechanic told me a interesting story a couple of years ago. A friend’s daughter had a fairly new BMW but just out of warranty. The young lady went overseas for 3 months, and not knowing any better, didn’t leave the battery connected to a smart charger to keep it in charged up. Of course on her return - flat battery. Got the car jumped by the auto club.
But soon afterwards she reported problems with the auto gearbox, changing erratically, getting stuck in gear etc. So off she goes to BMW dealer who calls her later that day and says bad news- gearbox is stuffed, its going to be like $20k to get a new one installed.
Her Dad rings my mate who says bring it around I will have a look. He asks her questions about the lead up to the problems and she tells him about the OS trip and flat battery, and jump start when she got home. He asks - did the BMW dealer ask you about that? Nope.
He goes to the local battery shop, buys the correct new battery, charges it up and installs it.
Gearbox problems resolved. Her Dad rips a new a-hole in the BMW dealer’s service advisor who didnt ask the questions they should have and nearly cost his daughter $20k unnecessarily - which wouldn’t have solved the problem anyway!
