I was starting to research getting an external extended battery for my smartphone and I ran across some that have a built in LED flashlight. I am just wondering if anybody here has tried one of those and how well they work. I really don't have an particular brand or model in mind. It sort of makes sense, in a way, that if you are going to have a rechargeable battery pack, why not add a decent LED light to it. It might be a dandy dual purpose device that way. It can be a flashlight, but it will also power your smartphone.