Nitecore Extension Battery Case for NU40/NU43/NU50 Black

Nitecore Extension Battery Case for NU40/NU43/NU50 Black. The battery case connects directly to the headlamp guaranteeing long-lasting illumination and stronger brightness. When connected to the Nitecore NU40 the NU43 or the NU50 the headlamps will automatically go into Performance Mode creating a better lighting experience for the user. When the headlamp is on it will first be powered by the battery case followed by the built-in battery of the headlamp allowing it to maximize its runtime. Weighing less than three ounces its well-balanced design provides an optimal weight distribution to the user for a comfortable and secure wearing experience. The Extension Battery Case is compatible with high-capacity rechargeable batteries excluding flat-top batteries. Equipped with an intelligent charging function connect a USB cable to a USB-C adapter to begin charging the battery when not in use. For added safety it features four red flashing lights to act as a signal light at night. Short press the Power Button for the power indicators to illuminate your remaining battery power. Specifications for Nitecore Extension Battery Case for NU40/NU43/NU50: Manufacturer: Nitecore Color: Black Battery Type: Lithium Ion Bulb Type: LED Bezel Diameter: 1.38 in Length: 4.17 in Weight: 2.29 oz Quantity: 1 Package Contents: Nitecore Extension Battery Case for NU40/NU43/NU50 18650 Extension Battery Case Cable Clip Nitecore ACC-NITE-186EBC: Extension Battery Case for NU40/NU43/NU50 Black