this thing be a boss ... nice to keep in the truck for hour of light or as a club be necessary . Mine recently disapear from my truck , I suspect my friend ... not of a ton of light output , but it can be focus , and the thing last forever with 4d battery , do not buy a 3d ... man up and get the 4d , if nothing else just so you can say you do not back down , and who want to use a odd number of battery ...