. . Our LED Combo Upgrade Kit ll replaces the incandescent bulb of a AA Mini Maglite® with a bright white LED and upgrades the tailcap of the AA Mini Maglite®. . with a simple push-button tail cap switch. Your incandescent AA Mini Maglite® will not only be easier and more convenient to operate, it will be brighter. . and more energy efficient. The LED lasts a virtual lifetime and uses less power, giving you over four times the battery life of the original incandescent. . bulb. The LED Upgrade Combo Kit ll is also fully focusable, so you can adjust its beam from wide flood light to narrow focus, according to the task at. . hand. It's an easy, economical, and ecologically responsible way to improve the quality and convenient functionality of your flashlight.. .