Features: - High quality solar panels， converting solar energy into electricity. - Built-in rechargeable batteries， suitable for long time use in rainy days. - With light sensor. After switching on， battery is charged in the daytime， and light turns on automatically at night. Battery: 1 x AAA 1.2V 600MAH NiMH rechargeable battery (built-in) Charging time: 6 hours Working time: 8 hours