This is a cool little power bank. It charges from the solar panel or if need be for a faster charge you can connect to a USB port. I only use it to charge my smartwatch and the 5000mAh battery is more than sufficient. I haven't used it yet with a smart phone. The flashlight isn't something I thought I would use but it is extremely bright. Now that I have it I find I have been using it for various uses. If nothing else it wows the kids :).