Hello BL31,
Welcome to Apple Support Communities!
We want to make sure you have the correct adapter for charging your devices in Australia.
The Australia charger has a triangular shape. Make sure you have the right adapter with the Apple World Travel Adapter Kit, found here: Apple World Travel Adapter Kit - Apple
"The World Travel Adapter Kit includes a set of seven AC plugs with prongs that fit different electrical outlets around the world, each laser-etched with the regions they are compatible with. For world travelers, this is the perfect kit to ensure power connectivity in most countries you may travel to.
The kit is designed to work with iPod, iPhone, iPad, and Mac notebooks. It is compatible with Apple USB-C Power Adapters, MagSafe and MagSafe 2 Power Adapters, 10W and 12W USB Power Adapters, and Portable Power Adapters.
The AC plugs included in the World Travel Adapter Kit directly support outlets in North America, Japan, China, United Kingdom, Continental Europe, Korea, Australia, Hong Kong, and Brazil."
We hope this helps you get the correct adapter for charging your devices in Australia.
Cheers!