Many luxury smartphone makers see their work mainly as a matter of wrapping an ordinary device in upscale materials, maybe adding a concierge service and calling it a day. Gionee, however, is taking a different approach: it's giving you one huge feature that gives you a clear reason to pay a premium. It just launched the M2017, a metal-and-leather 5.7-inch phone whose centerpiece is its enormous 7,000mAh battery. Yes, there's a real chance that it has a larger power pack than your tablet. The company estimates that it'll last for nearly 32 hours of talk time and 26 hours of non-stop video, or enough to get you through a few days of moderate use. If you're a jetsetting business type (Gionee's target market), you might never need to plug in during that all-important day trip.