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Amazon announced its first smart lock featuring an innovative built-in charging mechanism that eliminates the need for physical backup keys or hidden USB ports. The Ring Smart Lock incorporates a thumb-turn dial that can be rotated a few times to generate enough power to unlock the door if the rechargeable battery dies while the user is away from home. The product innovation addresses a common frustration with smart locks—the challenge of regaining entry when batteries are depleted. Amazon's solution uses kinetic energy harvesting to provide emergency unlock capability without requiring external charging devices or backup mechanical keys, improving convenience and user experience for smart home security.