when I receive it , I quickly open it up and pop the battery in . the intensity of this flashlight amaze I when compare to maglite of comparable size . it be able to compete with the 3d mag , too ! I be plan to upgrade the 3d to a led bulb because of this flashlight . it certainly be a improvement over the standard 2aa krypton maglite . it have `` dark spot '' but not the kind that the regular mag do . the beam be pretty round -lrb- a perfect circle , unlike the regular one -rrb- and have a bright spot in the center . the focus can be adjust to make the center wider or more focus . other than that , it be not really focusable much . \ Overall , a great buy for the money . handy , and bright !