Why won't the battery charge past a certain percentage? Allow your Gen 2 watch to completely run out of battery then charge it completely. After it is at 100%, press and hold the power button until it restarts. Related articles What third party apps are available for download on my CZ Smart Gen 2 watch? What is the Continuous Heart Rate Tracking feature within the Gen 2 Wellness watch app? How come I'm not receiving notifications on my smartwatch? How do I customize the watch face design? What are the sensors?