The PD-PRO-B Extended Battery Pack is an essential accessory designed to maximize the performance of your PD-Pro-B 16mm Binoculars. This compact and lightweight battery pack is engineered to significantly extend your device's runtime, delivering up to 50 hours of continuous operation with just 2 AA batteries. Perfect for extended outdoor adventures, wildlife observation, or long surveillance missions, the PD-PRO-B Extended Battery Pack ensures that your binoculars are ready whenever you are. Easy to attach and built to withstand rugged conditions, this battery pack is the ideal upgrade for those who demand reliability and endurance in the field.