I took my P2 out for a flight this evening and as usual made sure the aircraft was in full view by the time the iOSD was reading 30% battery life but this time there was something different - the rear LEDs were flashing rapid red, level 2 battery warning (suggesting <15% power remaining). As I had intended to run the battery right down anyway I held on to one of the skids and waited for the motors to quit; which they did at 15% as indicated on the iOSD. I've never done this before but I have often flown back with a little less than 30% many times and to the best of my knowledge I have never had rapid red flashing LEDs. The batteries were fully charged but hadn't been flown for a 10 days or so, the only difference with today's flight is that I had recently calibrated the IMU and upgraded to v3.04. So if you rely on your iOSD, particularly if you have upgraded to v3.04 it may pay you to keep a close eye on the Phantoms LED lights, at least for a few flights to ensure they agree with your display.