after receive one of these and a larger mag as a gift I be not sure where I would use this flashlight . as it turn out , I be use it more than the larger light . it be small size make it incredibly useful for small maintenance task such as work on a computer , poke around a car or even find thing you drop behind furniture . it be brightness be surprising . I have find it to be almost as bright as the mag 2d light .  I have some contact problem when I put the first set of battery in , but after play with the spring in the back and make sure the end cap be tight it work fine and have fail since .