I've had a car issue recently. Last Monday, after I got back from the art gallery, I went to go back out to the shops (in the afternoon), but my car wouldn't start. Great. At first I thought that the battery had gone flat. Later in the week I checked out the engine. All seemed ok, except the fluid level in the battery was low. So I bought some filtered / demineralised water for the battery, and refilled it. Tried jump starting it from a car that I had been borrowed for the week, but this didn't work. So early this afternoon I got the RACQ to come out. Actually, I'm a member of the NRMA, but they seem to have a reciprocal scheme going.
After a bit of testing, the battery was found to be dead. Not just a low voltage level. Kaput. Apparently car batteries only last a few years: I've had it for a while. The cells within it had shortcircuited and couldn't have any current drawn. Also extreme heat (something there was a lot of last weekend) ain't a good thing for batteries. The car is all good now - yay.