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.