Momax 1-World Travel Charger

Momax have a bunch of these ranging up to a 170W one for >$200NZD depending on how many things you want to charge at once. The model in this link is the price:perform sweet spot if you bring a dedicated charger for your laptop instead of trying to charge it off the built-in USB ports. You can charge all your other stuff off those. My family used these for ten straight weeks in the UK and Europe and have been using them at home ever since, so that's 9 months of use and abuse with no problems at all.