Stuck at the airport with everyone else hogging the recharging power points or on a long-haul flight with dwindling iPad battery but only half way through Veep? The new power banks let you charge your smartphone on the go. Here are the top five — the higher the mAh rating the more power they store.
1. Besiter Mercury
Nice and slim, with two USB ports plus lightning adaptor. Works with most devices including some laptops. When juice is running low it flashes its LEDs. Comes in black/grey or cream/gold. 10,000mAh.
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