Solar lanterns may resemble regular lanterns, but they have at least one definite advantage over traditional lanterns - they are solar powered! This means that they are easily powered by the sun's available energy and free energy. Solar lights are usually equipped with bright LED lights, rechargeable batteries and solar panels. The principle of operation is simple: sunlight passes through the photovoltaic panels to charge the rechargeable battery, which can be used as long as the battery is fully charged. For example, solar lights are especially bright in outdoor environments without AC power, such as camping. Manufacturers of modern solar lights have gone a step further and added USB charging. This will both provide emergency charging for your handheld, as well as charge the lantern's battery (if it has a power source). The USB charging function makes the solar light more suitable for camping, hiking, fishing and more. Some solar lights can even be folded, acting as normal lanterns in unfolded mode and flashlights in folded mode. Plus, it's more compact in folded mode, taking up less space in your backpack. There are many more classic looking solar powered lights that can sit or hang somewhere in your patio, backyard or garden. They look like candles made of metal inside. Actually, they're not metal, and the lights inside are not candles but LEDs, although they do create a retro vibe. The parts that cannot be seen from a distance are the solar panels and batteries. The lights automatically turn on at night and turn off at dawn, so they are truly maintenance-free.