Hand crank: It can be charged with a hand crank; 1 minute (2 turns per second) equals more than 8 minutes of burn time. It charges well even in bad weather. You never need to connect to an external power source, and it will never turn off. Solar powered: Thanks to solar panels, the solar-powered flashlight can charge itself in sunlight. A 30-minute charge in direct sunlight (12,000 lux or higher) is enough for 10 minutes of lighting. A 40-hour charge in direct sunlight will fully charge the battery. Place the flashlight on a window in sunlight for emergencies. Very compact and practical carabiner: This mini LED flashlight is small enough for a child to carry. Dimensions: 124 x 45 x 32 mm. Weight: 86 grams. Perfect for carrying around, it takes up almost no space in your bag. With its cleverly designed quick release buckle, you can securely attach the flashlight to a backpack, belt or key ring. This increases mobility and ensures that the flashlight can be charged by sunlight during outdoor activities. Energy-efficient and Bright: A built-in 40mAh NiMH battery and 3 LEDs ensure that this flashlight burns continuously for two hours on a full charge. It is bright enough (10000 mcd/130 lux) to light up the way during power outages or help you find your way when walking. It only supports hand cranking and solar power (no USB charging), which does not require any external power source, making it both energy-efficient and environmentally friendly.