the DeWalt dw908 18-volt flashlight accept DeWalt 18V battery , either nicd or lithium ion . if you use DeWalt 18V cordless power tool and have 2 or more DeWalt 18V rechargable battery , then this be a useful flashlight . of course , it work like any rechargable flashlight and its pretty bright as you would expect for a 18v flashlight . the value of it be in help manage battery life of the 18 volt ni-cd battery - you can use the flashlight to fully discharge the battery before recharge , thus get some use out of a battery that might be too weak to run you saw , but that can light up you flashlight for awhile . this help prolong the life of the nicd battery . the flashlight have a swivel head and store a spare bulb . I would give it 5 star if the swivel head could be position in ANY angle up , down or sideways .