The David Clark Battery Pack Module (Model XL-9V) is an essential accessory for pilots who rely on their headsets for communication. This compact and lightweight module can easily be attached to the back of your David Clark headset, providing an additional 9 hours of battery life. With the XL-9V, you’ll never have to worry about running out of power during a long flight. The module is also simple to use, with a convenient on/off switch and LED indicator lights to let you know when it’s time to recharge. Whether you’re a commercial pilot or a private aviator, the David Clark Battery Pack Module is a must-have for any pilot looking to extend the life of their headset.