Nitecore Extension Battery Case

The Nitecore Extension Battery Case is designed to extend the battery runtime of the NU40, NU43, and NU50 headlamps. 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 only 2.2 ounces and directly attached to the headlamp band on the back, it provides a balanced weight distribution to the user for a comfortable and secure wearing experience.