This spare prime power battery magazine is a must-have for anyone who owns a DAGR GPS AN/PSN-13 device. It is designed to provide uninterrupted power supply to your device, ensuring that you never miss a beat. The magazine is compatible with Rockwell Collins brand and is ideal for use in GPS units and vehicle electronics & GPS. With this spare prime power battery magazine, you can rest assured that your DAGR GPS AN/PSN-13 device will always be powered up and ready to go. It is a high-quality product that is designed to meet the needs of the most demanding users. This battery pack is designed to allow the DAGR to accept 4 AA batteries.