The Twin Power flashlight is a patent-pending, ultra-bright lighting tool that redefines traditional dual-power systems. It features a unique single-cartridge design that simultaneously houses a built-in 10850 rechargeable battery and four AAA alkaline batteries for backup. This allows users to toggle between power sources at the touch of a button to ensure uninterrupted illumination. Black construction, impact and water resistant. It delivers a maximum output of 600 lumens and reaches up to 125 meters. The unit is equipped with battery level indicators and offers High and Low modes with a 4-hour runtime. This innovative system ensures you are never without power during critical tasks.