Browsing the aisles at Bunnings today I came across these beauties.
AA
https://www.bunnings.com.au/arlec-aa-alkaline-batteries-50-p...
AAA
https://www.bunnings.com.au/arlec-aaa-alkaline-batteries-50-...
Arlec generally are considered to market cheap and somewhat crap electrical items.
I cannot speak for the quality, but they are less than half the price of the Duracell's and significantly cheaper than the Varta's.
Pretty sure they will actually be a completely different brand of battery but rebranded.