Forget a power bank, this is the most effective way to charge your phone while travelling

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Though portable chargers and power banks were once an absolute essential for long-haul flights, many airlines have completely banned them from being used on planes.

This is because their lithium-ion batteries pose a fire risk, especially when subjected to changes in air pressure on a plane.

So, what's a screen addict to do when faced with a 17-hour flight and no chance to charge their phone?

Thankfully, there are other ways to juice up your devices.

For example, your laptop can be used as a power source for your phone or tablet.

Just plug your phone in, and voila! Your laptop has essentially become your portable charger.

Even if you're not flying on an airline that has banned the batteries, travel expert Karl Loudon also says the trick is a great way to save space in your bag.

"Your laptop is one giant power bank, which many travellers forget about," he told Netflights.

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I used this tip recently while travelling to Hobart for a one-night stay.

I was trying to keep my bag light and my packing as streamlined as possible. So instead of packing a power bank with my cords, I just let my laptop do double duty as a charger, too.

Of course, it does mean that you have to remember to charge up your laptop before heading to the airport. I just plugged my charger into the wall right next to the bed so I'd see it and remember to charge my laptop overnight.

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Meanwhile, if you forget to bring a charging port or your laptop is out of battery and your phone is looking dangerously low, there's another way you can charge it.

Most hotel room TVs have a USB port in the back. Simply plug your charging cord into that, and it'll provide power to your phone.

Sometimes it'll be a slower way to charge, but it's better than nothing.

Most airlines have had a long-standing rule that you must pack power banks in your hand luggage, but now more regulations are being introduced for carry-on as well.

Singapore Airlines, Emirates, Cathay Pacific, Thai Airways and Vietnam Airlines are just a few of the major carriers that have banned their use on flights.

While they can still be brought into the cabin, they are not allowed to be used and must be kept in clear sight. And the battery packs can also no longer be charged using the seatback ports.

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