Your car, assuming its has the i ELOOP system as shown in the picture, requires a special battery. ... The Q85 battery isn't the same as a normal car battery. ...You can't just slap in an equivalent battery from Autozone, there aren't any.
This is wrong. You can't use a standard starting battery, but you can replace it with an AGM deep-cycle battery, because the Q85 battery is nothing more than an "enhanced flooded" lead-acid battery for deep-cycle applications. These batteries are now common in decent parts stores. One brand is "Optima" (specifically, their yellow-top line); also Bosch makes a line of AGM batteries. These things are common because lots of cars now have start-stop systems or systems like the i-eLoop. They aren't cheap, though: expect to spend $150-200.
TL; DR: go to Autozone and buy an Optima Yellow-Top.
Lastly, you can try to preserve your OEM battery for a while longer: clean off the top, then carefully open each cell and check the water level. The water may be low. Carefully add *distilled* water if necessary. I used a syringe to do it accurately in mine: one of the cells was noticeably low, a couple others were just a bit low.
Also, while you can buy actual "Q85" batteries in Australia, the more generic AGM batteries like Optima Yellow-Top and Bosch are superior, and much cheaper. The Q85 is still just an "enhanced" flooded lead-acid battery, and horrendously overpriced; AGM is a superior technology. See this company's blurb about the applications for AGM.