Emergency lights play a critical role in enhancing the safety and security of building occupants during emergencies by providing directional guidance, illuminating exit routes, highlighting firefighting equipment, and ensuring compliance with safety regulations. Their presence can significantly improve the effectiveness of emergency response efforts and minimize the risk of injuries or fatalities. The battery system is indeed a critical component of emergency lighting, providing power to illuminate exit routes and critical areas during power outages or emergencies. The main types of emergency exit light systems are Self-Contained Emergency Exit light system, Central Monitoring System and Central Battery system. The most common brands used are Eaton, Guard max, Frontier, Gessler, Mega light, Dali, Eaton, JSB, Ceag, Emergi-lite, EML, TM Technology, Easi check, Teknoware, Clever light, Awex, Olympia, Secure and Inotec.