Top 10 green gadgets for your office

While the tendency for phone manufacturers to cram ever more functionality into mobiles has helped gadget freaks cut down the number of gadgets they carry, that smart phone in your pocket still sucks down the energy.

Rather than shoving it in the wall for a top up, there's a range of chargers out there that use solar energy to power up gadgets.

The Solio, shown here, can power all the standard gadgets – MP3 players, phones, games consoles – at the same rate as having it plugged into a conventional plug socket and the device will hold charge for a year.

Photo credit: Solio