while this be not something you would want to carry on you person every day as I do with a compact cr123 lead light that cost a lot more money but also work a lot better , it fill a great role in a vehicle as a illumination tool and impact weapon if that be what you be into . I have go though a few of the 4d version over the year , battery leakage have always eventually kill they live in the truck , but they be cheap enough to replace it be not a big deal . this bad boy on Amazon be a great buy and a aftermarket lead conversion really wake it up . what else be there to say ? it be a maglike , it be big and heavy , it be be around forever , it be extremely inexpensive for what you be get , and it 'll take a lot of abuse before give up the ghost . heck , for this price you could swap the led conversion from light to light as they die\/wear out and probably have a truck light for a few decade until we be all ride bicycle anyway . overall , a solid piece of kit and the low , low price from Amazon make the cost of the aftermarket lead conversion easier on the wallet .