Eneloop! That's it! It's all about AA series:
Panasonic Eneloop Pro AA Rechargeable Batteries 8-Pack $44.00 with Free Shipping
https://shop.techlake.com.au/product/panasonic-aa-eneloop-pr…
Panasonic Eneloop AA Rechargeable Batteries 8-Pack $38.50 with Free Shipping
https://shop.techlake.com.au/product/panasonic-eneloop-aa-8/…
Shipping is on the same business day if ordered before 3pm AEDT.
How many batteries do people need…..and what for. For ~$5 a battery, no chance!