We've all been there: you set off for your holiday with a fully charged phone, but by the time you reach passport control it's dead.
That's hardly a surprise - how better to kill time while you wait for the Gatwick Express, or queue for check-in, than by playing LEX on your iPhone 5s? But beware - US transport officials have now announced that customers on direct flights to the States may be asked to prove their devices turn on as a security measure. In which case too much LEX could quickly spell disaster.
Fortunately, there's an easy workaround: carry a decent USB charger with you. Although you might also want to make sure you've got a charger for your charger. And a charger for the charger's charger. And so on.
Anyway - here are seven USB chargers we like the look of.
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1. Apelpi Slim
What could be more perfect than an apple to fill up your iPhone? Well, a mini-Steve Jobs? But that might feel weird if you were using its 3200mAh battery to charge up a Samsung.
2. Momax iPower Extra
See how aping a human action brings untold fun to recharging? This charger mimics the effect of a can of energy drink by having a whopping 6600mAh battery. That’s 4.6 iPhone charges.
3. Arka USB Charger/Lantern/Flashlight
There may be half a packet of Lockets in your glove-box, but wouldn’t this 4000mAh charger, torch, lantern and SOS warning light be more useful?
4. Star Wars Lightsaber Portable Battery Charger
Darth: “If only you knew the power of the dark side.” Luke: “No thanks, you goth nutter. I don’t need it. I’ve modded my lightsaber to be a USB charger. ”
5. Monster Powercard
In two dimensions, this 1650mAh charger is handily credit-card-sized. In the third, for practical reasons, it has to be exactly one USB port thick. But still, that isn’t very much, really.
6. Devotec Fuel
The tiny handbag-and-forget Fuel only has a 220mAh battery, which will add a few percent to your ailing phone. But if you can remember it’s in your bag, it might just save the day.