I just finished all my tasks for the evening, so I thought I'd turn on the bird, and check the settings in the app that I haven't seen before. I bring everything up in sequence, and I get a firmware requires upgrade. I click on it and it says battery firmware upgrade. I click on it and it goes back to the main menu and the firmware warning is gone and everything appears normal. I don't get it, since I upgraded the firmware (1.6xx) last weekend and have already flown twice with no issues. So what is this battery upgrade and how does one accomplish it? I'm beginning to think this drone business is buggier than Windows ME.