Sometimes you want constant power to your light. Other times you know you'll be out for awhile and you want to conserve energy. Either way Smart Light Technology settings allow you to choose how much power you want to use to operate your light.
Now add to that individualized programs you set quickly and easily with a simple click on the tail switch. There's one for professionals, an easy everyday mode, and one for defense. Each program has unique functions from simple on/off to, "S.O.S." and even a potentially lifesaving "defense strobe."
Simple, fast and custom for you. Smart Light Technology is one more way LED Lenser puts the "brains" in "bright."

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Smart Light Technology (SLT) has two distinct energy modes. You can choose between the Energy Saving mode, which optimizes burning life, and the Constant Current mode with electronically controlled, continuous light output.
The Low Battery Indicator, another feature of SLT, constantly checks the battery charge condition and informs you when its time to replace the batteries (excludes M1 and M5).
All lights are shipped from the factory in the Energy Saving Mode.