The greenies among us will love this: the Strapya mini solar cell phone charger! Smaller than an iPod, this device only needs to drink up 6-10 hours of sunlight and then it serves as a completely dependable backup power source for your cell phone. The mini solar charger hooks up to your phone via an adapter and offers up to 3 hours of energy on the go. Such a useful, environmentally friendly device sounds like it might be expensive, but at just 1,900 yen ($17.54) this is probably one of the cheapest ways to help save the planet we've seen in some time.

Full story: dvice.com