bicycle flashlight: /Product Features: Working environment temperature -20 +50°C Starting environment temperature0 +50°C Waterproof degreeIPX3 Waterproof Continual illuminate time180 mins Brightness1400LM Bulb life-span≈2500hrs Irradiation distance≤50m Color temperature6000K (Option:4200K, 5000K, 8000K 10000K) Optical efficiency70LM/W MaterialALU Weight1.12kg/Electricity parameters: Ballast input voltage 9 16V Working voltage12.6V Working current2A Starting max current≤4A Power output20W Output temporary max voltage:23KV Battery modeICR18650X3S2P(6600mAh) Battery charge voltage12.6V ± 0.1V Battery lifespan (charge and discharge times)≥500 times