Some days you just need a little extra energy to keep you going, e. g. coffee, tea, an energy bar, maybe some jumping jacks. The Mophie Juice Pack is a shot of espresso on top of an energy bar for your HTC One. Just charge the case simultaneously with your phone regularly and, when your phone is almost kaput, just activate the case and double your HTC's battery life. No more worrying about scratches, bumps, and whoops: the Juice Pack also protects your phone with a durable and scratch resistant casing. Sleek and stylish, it complements the contours of your phone like a fine pair of pants and fits perfectly in your pocket without the bulk of most cases. Continue to access your camera, buttons, and remote functions without sacrificing any protection whatsoever.