Noise canceling headphones can be convenient, but what happens when the battery dies for the active noise cancellation? Noise, annoying outside noise. Blackbox just released the i10, a pair of ear buds that uses the iPhone or iPod Touch’s battery to power the noise cancellation. They plug in via the 30-pin dock connector to draw juice so unless you’ve got an iDevice they’re just good old regular ear buds. If you’re interested they cost about $120.