The (2 units) G4 Inogen BA-408 Double Extended Battery is a medical device accessory designed for use with the Inogen G4 or Rove 4 ostomy aid. Made by the brand Inogen in the United States, this white battery is specifically designed to extend the battery life of the device, ensuring continuous power for daily living aids and mobility support. Perfect for individuals who rely on these products for health and beauty purposes, this double extended battery provides a reliable and long-lasting power source for medical devices. Holds charge. Tested.