exaac,. .. .After a thermal runaway we don't do any servicing. The battery is scrap. Normal maintenance for a NiCad battery includes discharging the battery while monitoring each individual cell then shorting each cell as it falls below 1 volt. After all the cells are shorted the battery is left to stand for 24 hours, then the links are removed and the battery is charged up again. This process is referred to as cell balancing and it plays an important part in preventing in-service cell reversals and overheating. These days most NiCad batteries have thermal sensors that can operate overheat warning lights or open the battery circuit breaker in the event of an overheat. The commonest cause of battery overheating is low water levels in the cells. With regular inspection and maintenance a NiCad battery can provide good service for years. A replacement for a typical aircraft 25AH NiCad will set you back more than US$3,500 so it pays to keep your eye on the water level and do regular cell balancing.. .. .**********************************. .Through difficulties to the cinema