We went model flying today. I got a couple of nice flights in then a near disaster. The receiver battery had decided to crap out and the airplane arrived on terra firma in an uncontrolled state. Fortunately, there was no damage. We were baffled about why there was absolutely no response from the airplane since I had just charged the battery. A quick test with a volt meter showed the battery was the culprit. It is always a problem when glitches occur because it is sometimes hard to isolate the problem.