Forgot your charger? No problem. Scientists have developed a microfiber fabric that can generate enough electricity to juice up a cell phone or a mini-music player. If turned into clothing, the fabric would get its power from the action of your daily movement. The material uses zinc-oxide nanowires that are arranged in pairs—one wire in each grouping is coated with gold, and serves as the electrode. When the fabric moves, the wires move and bend, and the fabric translates this mechanical energy into electricity.

Green Plug wants to rewire your gizmos and even your home, and ditch most of your wall wart chargers in the process. Instead of each gadget having its own charger built to deliver just the right amount of power, it would have a chip that tells a universal charger how much power it needs.

If you travel frequently, you’re probably lugging around a clunky array of backup batteries for all your wireless gizmos. Soon you’ll be able to lighten your load with Medis Technologies´s new nine-ounce disposable Power Pack. When your iPod dies mid-flight, you can plug it in for a full on-the-spot recharge. The 1.3-watt device will do this five times. It will also deliver five full charges for your digital camera or 20 hours of talk time for your cellphone before it’s spent.