In terms of design, FuelBand is a stunner—a single continuous loop with semi-flexible electronic components covered by rubber, a material that’s comfortable enough to wear all day. A roughly 0.7” metal piece on one end serves as a simple clasp mechanism: press the small button and the bracelet opens, exposing a connector that turns out to be a half-height USB plug. This keeps the band splashproof, so you can wear it in the shower,…