1. Emergency and stand by lightin Product characteristics: A. Rated capacity 2400mAH of the high ability of it. B. Durable recharge period more than 200 times. C. Use 40 long life\high brightness and retrench power LED. D. Strong and light brightness are adjustable. 2. Usage Instruction: Lighting time: 12hours for continuously lighting for 20 lamps and 6 hours for 40 lamps 3. Notice: A. When use it, please charge it enough firstly; Please charge it every store three months if you don't use it. B. Please charge it in time when the lighting ray is becoming weak, otherwise, it would affect the battery's life. C. Do not use it when charging. D. Do not expose this product to rain or moisture.