Home › External Detachable Battery | Caire AirSep Freestyle 3/5 | Item BT033-1 External Detachable Battery | Caire AirSep Freestyle 3/5 | Item BT033-1 DescriptionBrand new external battery for the Caire Airsep Freestyle 3 and Freestyle 5 portable oxygen concentrators. The detachable battery is for the white Freestyle models. Default Title - $199.95 $295.00 $199.95 Share 0 Tweet 0 Pin it 0