Lifecycle of LEDs up to 100,000 hours. No need batteries. Power-saving, it works with mechanical drive to light up. Lifecycle of LEDs up to 100,000 hours.No need batteries. Power-saving, it works with mechanical drive to light up.30seconds hand press will be lighting about 3-5mins Constantly using the health torch, it can be benefit to your palm, arm and shoulder stretching and blood circulation, ...