I ran my AIR for the 1st battery with no problems. I replaced the battery for my next flight. When I lifted off, I noticed that the 2 front red lights were out and I got a message that the video transmission of the flight was weak. Since neither of these problems seemed to affect the flight I took off and soon got my transmission coming back as normal; however the lights remained off the entire full flight. I was out of live batteries, so could not check it out to see if lights come back on. Will have to wait until tomorrow to see if that problem still exists. Any reason for the lights to fail??? I did change from photo to video on the second flight. It was at twilight, so perhaps the red lights turn off for video as the sky darkens so that the blinking red lights do not interfere with the video.....but I would think that I should have that option......?????