![]() ![]() ![]() An additional benefit is that LEDs are a more efficient light source and the battery life will be significantly longer for the same light output.įigure 3 shows a disassembled Maglite 2AA. The driver chips are switching regulators design to provide a constant current to the LED, which offers the benefit of a constant light output independent of the battery voltage. There are several low cost white LEDs and LED driver chips are available. The goal for this project is a LED conversion that will maximize battery life with a LED retrofit that has a light output close to the 4 to 5 lumen level. At the lower lumen output the battery life may be increased by 2 to 3 times while at the higher lumen outputs the battery life is reduced ![]() While there are LED replacements for Maglite 2AA, they concentrate on increasing the light intensity output to 30 to 175 lumens. The opinion of several flashlight forums is that a 4 to 5 lumen specification is more realistic. Figure 2 shows the bulb current and power vs. Figure 1 shows the darkening of the bulb. Additionally, the light output falls rapidly, while the light’s color temperature shifts to the red, as the battery drains down. The bulb darkens over time, which decreases the light output. There is a lot of controversy on the actual light output of the Maglite 2AA. The 2-AA Mini-Maglite's official specification are: This project retrofits the incandescent bulb version of the Maglite 2AA flashlight with a white LED. ![]()
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