Flew 5 flights yesterday on my 3 -47's and 2 -48's. Charged them all up this morning with no problems. One of my -48's turns on normally when installed on the aircraft, but does not power up the aircraft. Have turned it off and on several times with the same result. All other batteries operated normally today The battery that doesn't power up the aircraft has 24 charges with no issues. Deep cycled twice down to 3.3v. Any ideas on why the battery turns on (4 lights), but won't power up the aircraft?