Apparently I did not seat my battery properly, after about 10 minutes of photographing some acreage for a client I saw the battery eject from my P3A. To say the least it fell iike a rock from about 50'. Picked up the pieces and returned home Some damage to the body. Reinstalled the battery, normal start up noise, the loud tones, nimble did its thing. Could take pictures, camera would not rotate up and down Then I tried to start the P3A, all four motors would not fire up. A "ESC error - restart aircraft" - I pulled the upper shell housing, everything looked normal. Any thoughts on what to check?