The Fenix PD40R USB rechargeable flashlight is powered by an 26650 Li-ion battery (included) that produces a maximum 3000 lumens when in Turbo mode. Gain extended runtimes while utilizing any of the other 4 lighting modes and 2 strobes. Seven lighting modes are easily accessed via the dual side switches and battery level is indicated by a color ring on these switches. Other features include digitally regulated output and IP68 waterproof/dustproof classification. *The 3000 lumen turbo is a timed controlled output that will drop to 1000 lumens after 1.5 minutes. Do not purchase this product for it’s 3000 lumen turbo setting. The main advantage of this light is the 1000 lumen output for extended 2 hrs with 21700 battery.