Our LED Upgrade ll replaces the incandescent bulb of a AA Mini Maglite® with the bright white, focusable, and shock resistant LED. It provides high quality light and more powerful illumination. The long-life LED virtually never needs replacing and is much more efficient. It increases your battery life by more than four times that of the original incandescent bulb! The LED Upgrade ll is fully focusable so you can adjust the beam from wide flood to narrow focus, according to the light you need for the task at hand. Bright, economical, ecologically responsible, and functional - the LED Upgrade ll is simply the best way to improve the performance and extend the lifetime of your incandescent AA Mini Maglite® flashlight.