I leave this outside for about 4 hours directly under the sunlight as soon as it arrived last Saturday. Today is Thursday and it is still charged. It can be charge with USB cable (not included). Like that is day bright light, portable for a good price. Small enough to fit almost everywhere and provide really bright like to brighten a very dark room. Is too soon to know if it last, but I'm confident it will. I also love the rechargeable flashlight that is very versatile and can be placed on a bike or stroller. It is very bright and so useful. Overall great buy and I highly recommend.