Solar power isn’t the only form of green power that can be harnessed to power your iPhone. Designers out there have come up with a concept device called Wind Cubes and we don’t need to tell you what kind of power it runs on. This device is designed to be installed on a wall and you can combine multiple Wind Cubes together to gather more power. If there isn’t much wind going around, the fan blades can be pushed back into the device to be safely stored. The designer claims that these Wind Cubes could potentially generate 21.6 kilowatt-hours per month and if you have about fifteen of these around, you could probably generate enough juice to keep family of four happy.