That's pretty much what I thought, but the battery was only about 6 months old. Aso, as soon as the alternator kicks in there's 14 volts, and the batteries are linked. So I doesn't matter what either battery is like, as soon as the vehicle is running the isolater links them.
Also, I understand that the battery could well have been sitting on the shelf at the Kmart service centre for god knows how long.
I should never have bought the damn thing from there.
The "mechanic" ought the battery out, sat it in front of the other and said (and I kid you not) "The terminals are on the wrong sides of the battery"






I said "turn it around" then he actually asked me if I wanted him to fit it

THEN I had them do a wheel alignment o the vehicle, which I paid for up front.
Upon returning to pick the vehicle up the service manager proceeded to tell me that I must have put a left handed threaded ball joint in the right handed threaded track rod and therefore they couldn't do the alignment


I went home and clambered under the front end, the STUPID ***** was turning the whole track rod, not the adjuster.
Bookmarks