I have be a home inspector for 19 year . about 14 year ago , I buy a mag rechargeable . in all of those year of crawl under hundred of house , bang that light against rock , floor joist , and in one case , a agitate field rat , this thing have never fail I . I be look at buy a second one , and only my FOURTH battery after all of those year !!! one of the reason for buy another one be that the switch finally fail , and I refuse to use a ` lesser ' light while I be have this one repair . the time that I have have to use my backup regular flashlight -lrb- a pretty decent rayovac roughneck -rrb- , it have be like be ` blind ' under a house ! the pure brightness be amazing ! the spot focus on this light be very precise , though I have find that some bulb focus better than other . these thing be also tough ... I have drop mine a couple of DOZEN time onto concrete and asphalt -lrb- yep !!! I be clumsy ! -rrb- and that will sometimes kill a bulb . . but the flashlight be almost indestructible ! if you could just see how battered and scar this thing be , you would not believe it still work ! you will not be disappoint in this flashlight ! it be the BEST investment that I have make in equipment ever !!! enjoy !