What was found
AFTER TAKEOFF, FLIGHT CREW RECEIVED A BATTERY OVERTEMP WARNING AND BATTERY TEMP INDICATION ROSE ABOVE 188 DEGREES C, UPON RETURN, BATTERIES WHERE COLD TO THE TOUCH, PERFORMED RESISTANCE CHECK OF THE THERMISTOR IN THE NR 2 BATTERY AND THE RESISTANCE WAS OUT OF MM TOLERANCES. R & R THE THERMISTOR IN THE NR 2 MAIN BATTERY, ALL GROUND CHECKS NORMAL, RETURNED THE ACFT TO SERVICE.