Living with a Porsche 944

So the battery was flat this morning, which can be expected for cold weather and little use, and so began my tale of two batteries. The first battery was supplied by my local Kwik-fit. This was contrary to my gut feeling and I reinforces just why I will never buy anything on the spot like that again. I took the 944 down to have the battery checked after having to jump start every time I shut down. Turns out the battery was nuked and the helpful tester reckoned the alternator wasn't charging correctly either. As I didn't feel like any more inconvenience I enquired about a replacement. What was recommended to me by the gent behind the counter according to the "blue book" he held, was a 59Ah replacement. The problem was that a 72Ah battery sat in my car. I was informed that the higher Ah unit would overload the electrical circuits. I was puzzled. I should have just walked away there and then. But no... Later that evening when I needed to start the 944 to go to my kids Ca...