What was found
AS SOON AS WE LEVELED AT ALTITUDE FOR A FEW MINUTES, FL 360 FAS IN THE AFT CALLED W/ A BURNING BATTRY SMELL, NO VISIBLE SMOKE OR FIRE DIVESTED.-R+R OZONECONVERTER IAM AMM 21-58-42 PERFORMED AQE PER TSM 05-50-00-810-831-A AND FOUND INSULATION BLACKET DAMAGED FROM HEAT R+R RECIRCULATION FILTERS IAW AMM 21-21-41 OPS CHECK GOOD NO BURNING SMELL NOTED A/C OK FOR SVC DESCRIPTION OF ODOR/FUMES: OTHER, SMOKE/BURNING SMELL/ELECTRICAL. CONTINUOUS AND DISCOMFORTABLE. APPARENT CABIN SOURCE: UNKOWN. FWD CABIN/GALLEY(LAV). AFT CABIN/GALLEY(LAV), MID CABIN, AND FLIGHT DECK. NO VISIBLE SMOKE/HAZE. NO MEDICAL ATTENTION REQUIRED.