1. Low cost, high satety, 2. Maintenance free Li battery is used 3. Main light source used 7pcs of high bright and small power LED 4. Handset charger is used Main technical specifications 1. Rated capacity 3Ah 2. Nomial voltage 3.7v 3. Lighting times more and equal 15 4. LED light source A. Rated voltage 3.3v B. Current of main light source 160MA C. Current for auxiliary light source 110MA 5. Maxi lightness at 1M A. Begin lighting 800LX B. Lighting 11 h 600LX 6. Weight 700g 7. Nos of battery cycle more and equal 500 times