appendix b Seestar S50 has a built-in lithium battery with a capacity of 22Wh, which complies with the Civil Aviation Administration of China’s standards for air transport. Based on our past experience, carrying it with you is usually no problem. If you plan to check a device, some airlines require passengers to remove the battery from the device. We therefore recommend that you check with your airline in advance to ensure compliance with their lithium battery regulations.