Smartphones are getting faster with every performance update, but as they are becoming more powerful and in need of some juice this causes batteries to drain quicker and degrade over time. This has created the need for the power bank. We've all been there on a train journey home with someone picking you up when your smartphone runs out of the battery at the most inconvenient time, and you wish you had that little bit more power at your disposal. Our power bank, the U4000M, is small and sleek with an LED torch. It is clever too, with an intelligent charge with an auto safety cut-of. Most importantly, it will power up a Smartphone or Tablet; quickly from a full charge.