Features: 1.Cranking for power generation, no external batteries are needed, green, eco-friendly, economy and safe. 2.High luminous (3 LEDs for lighting), meet the basic needs of lighting. 3.Can be charged under the room light. 4.Unique design, low noise but high efficiency and long lifespan. 5.The soft TPR protection frame to protect the Amorphous silicon solar cell from damaging. Main Technical Parameters:ItemSpecification Lighting time after 1 minute cranking≥9minLighting time after 20 hours charging by light energy≥8 minLuminous flux ≥6LmLighting time when fully charged≥100minLighting distance≥10mLED light50000 hr.Switch lifetime100 000 timesThe whole unit lifetime5 yr.Plastic part lifetime5 yr.The built-in battery specification80 mAh, 3.6V, NI-MH battery Amorphous silicon solar cell6V, 15uAMotorWith brush 300