Providing up to 90 minutes of emergency operation, the O-Z/ Gedney CID2 explosion-proof lighting system utilizes a solid-state charger that maintains the sealed-cell, maintenance-free battery at full charge. During emergency operation, the battery is protected from deep discharge by a low-voltage disconnect circuit. The rugged CID2 can be installed in NEC Class I, Div. 2 areas, and in Class I, Zone 2 rated applications.O-Z/Gedney, Rosemont, IL.