In crowded buildings such as shopping malls, office buildings and residential communities, 12V100Ah lead-acid batteries are widely used for backup power supply of fire protection and security emergency systems. They are compatible with key equipment including fire alarm hosts, emergency lights, security monitors and access control systems, and start power supply immediately once the mains power cuts off. With sufficient capacity to support long-term continuous operation of multiple devices, they meet the core needs of building emergency evacuation and safety monitoring. Featuring sealed leak-proof design and maintenance-free performance, the batteries are suitable for long-term indoor installation, ensuring stable and noiseless operation of building public safety systems during sudden power failures.