Ulanzi 2309 G9-2 GoPro 9 / 10 Battery Lid. The Battery Side Door for Gopro 9 / 10 provide access to USB port while battery and SD card are safely covered by the door, without fearing the battery will fall out.The Clip on Battery Cover offers charging type C port for charging Gopro 9 / 10, so you can use power bank together with it, perfect for continuous shooting especially for recording time lapse or video