Emergency light is with built-in long-life and maintenance-free rechargeable battery. It has more than 5000 times charging and discharging recycle. You need to just 7 step Rotate the button to turn it on and off. It has runs for 2-4 hours when fully charged by Android charger. Ideal for studying, cooking, camping, household and leisure activities with 360 or 180 degree lighting.Suitable for home, office and Specially for outdoor use like camping.Saving energy and super bright LED/COB design, easy to use and convenient to carry.