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DP-713C The Emergency light is with built-in long-life and maintenance-free rechargeable Lead Acid battery of high capacity as 1300mAh. The battery has more than 500 times' charging and discharging recycle life. LED is in advantages of energy-saving, high light, long life and high power. Both high light and dim light for choices. Instructions: Connect the power supply, if charging indicator turns on, then it’s in charging status. Charging time needs about 18 hours. Strong/weak light can be chosen by pushing the switch up/down. When the light becomes weak during using, that means the battery is in lack of power. At this moment, stop using it and recharge it in time so as to protect the battery. Recharge it before the light is completely invisible, otherwise it will case damage to the battery. Frequent use is required, long-time nonuse is unadvisable. If you don’t use it very often, please recharge it every 3 months, or the battery’s life-span will be shortened.