1. Rated capacity 2.5Ah 2. Nomial voltage 4v 3. Lighting times more and equal 12 4. LED light source A. Rated voltage 3.3v B. Current of main light source 200MA C. Current for auxiliary light source 110MA 5. Maxi lightness at 1M A. Begin lighting 800LX B. Lighting 11 h 600LX 6. Weight 210g 7. Nos of battery cycle more and equal 500 times