It's a pain to pack for a trip when you're grappling with a tangle of cords and accessories. But as long as you're toting a laptop, USB Cell batteries let you ditch battery chargers. Just pop off the green cap on one of these puppies and plug it into a USB port on your PC. USB Cells come in AA, AAA, 9V versions, with flavors for iPods, digital cameras and smart phones. These Nickel Metal Hyrdide (NiMH) batteries lack the toxic ingredients that muck up alkalines and NiCads, and they last longer. You just slide off the cover of a compatible phone or camera to charge without having to remove the battery. I was all set to place an order, but you can't buy these outside the United Kingdom at the moment. Instead, I joined the wait list at maker Moixa Energy's Web site (via The Green Guy).