Carriers are forever looking at new ways to incentivise customers -- whether it be with a subscription to this, or discounts on that, and so on -- but we can't recall any perk that's quite as practical as the one EE's introducing shortly. (Unless you're running an ancient Nokia, that is.) In the "coming weeks," EE's launching a scheme whereby any customer can walk into a store and pick up a free portable smartphone charger. The EE-branded "Power Bar" hosts a 2,600mAh battery, which'll be roughly enough for one full charge of your phone. What's more, if you find yourself carrying around a dead one, you can walk into any EE shop and switch it out for a fully charged replacement at no cost (you can refuel it yourself at home, of course). Best of all, there's a satisfying amount of small print attached to this offer.