Despite its mid-size (C-cell format) dimensions, the ML150LR generates a stunning 1,000 lumens* and achieves a beam distance of over a quarter-mile. And thanks to multiple power settings and critical efficiency innovations, it can run for up to 75 hours on a single charge of its state-of-the-art Lithium Iron Phosphate (LiFePO4) battery. An LED light engine must be kept cool to run efficiently, and poor heat dissipation is a serious performance-limiting factor with high-output LEDs. The solution, newly patented by Mag Instrument, is an integral heat-sinking technology that quickly drains heat from the LED. A versatile charging cradle that can be powered from a standard wall outlet or the 12-volt DC electrical system in a vehicle. Multiple power settings to control light output and battery burn rate. IPX4 water resistance. An advanced user interface with five available functions, custom-configurable to suit the individual user preferences.