No need to worry about your phone is charged or not. This power bank charge your phone and make you use the device without any problem. The power bank chargers two to three devices. It is nice small and portable. In fact, it is rechargeable too. You will also get a charging cable to charge your smart phone and the power bank too. Amazing, little device which solve the problem of phone charging even on long journeys. Accompanied with power bank you will even get £25 free. Just go for a phone contract deal and get these surprises free of cost.