8. Pico Genie A100

Adding a little multimedia prowess to your iPhone 4S, the A100 is a pico projector that also masquerades as a lightweight case. With 12 Lumens of projection brightness and 2 watt speakers, you can look at your favourite TV shows, videos and pictures on the nearest available wall. The battery extender also boosts the life of your Apple smartphone by a sizeable three hours.

Price: £250 | Buy: Pico Genie A100 for iPhone 4s