[. . . ] Read instruction manual Remove battery pack from the flashlight before replacing the bulb. [. . . ] Check the charge level at least once a month, especially if used for emergency purposes. Let battery sit a few minutes or until it reaches normal operating temperature. Release battery pack A from handle base b by pressing the battery release button C and sliding pack out of handle base b. To insert battery pack A, align with handle base b and slide into handle base b until it locks into position. To turn the Flashlight "ON", squeeze and release trigger switch D. To turn Flashlight "OFF", squeeze and release trigger switch D. Your Flashlight has a swivel head that can be rotated to desired position. To change the position of the head, rotate counter-clockwise until it stops. [. . . ] Use only Skil battery pack catalog number SB18A, SB18B & SB18B-LI. [. . . ]