This deal beats a popular deal from SuperCheap back at the start of July.
AutoBarn has 30% off all Batteries, 30% off oils, and everything else is 20% off (storewide) for Friday and Saturday only with some exclusions. Prices are off RRP and can't be used with other offers.
I would go the Century personally, made in QLD.
Check to which Century batteries fits your car here: https://www.centurybatteries.com.au/resources/battery-finder