I’m not sure, I haven’t used one before but once bought one for a friend who was in a tight spot. You might want to check which features each of them have as the very cheapest (Big W) says it’s a camping one. Also check Amazon and Ebay to see if they’re any cheaper as sometimes it can be the exact same thing as in the chain store

Edit: Ok it says the camping one comes with an AU adaptor so might be ok? But I didn’t want to miss mentioning that.

They are actually not cheaper on ebay. But the one I got my friend looked like this