had the low battery alarm go off on the android app during a flight last nite. i was basically hovering overhead, and yawing around to see the sunset and fall colors. at one point i did lose connection with wifi, but by re-aiming the tx and wifi antenna back up towards the phantom it was better. the battery alarm did come on a couple of times after that, no indicators on the screen, and no indicators in the phantom LED, steady green flashes and red normal lights. it would sound the audible alarm for a few seconds, then stop. had 3 flights the day before with no issues. it happened with 60% or more battery showing in the app. also, i notice for still photos, the app seems to take forever once you snap a picture, the screen goes all grey , " animation like the shutter is closed" and then after 10 seconds or so it comes back... is that normal?