Here’s a MetaEfficient Keyring. It’s a collection of lightweight, mini-tools suitable for carrying on a keyring.
We’ve seen prototypes for solar-powered cell phones, but now a Chinese company claims to have developed the world’s first commercially available solar-powered cellphone. The company says a scale-like solar panel on the top side of the phone can also be recharged by light from artificial sources. It can provide 40 minutes of talk-time after sitting […]