The 12V33Ah lead-acid batteries is widely used in building fire protection and security emergency systems as a key standby power source for fire safety equipment. It is compatible with fire alarm controllers, emergency broadcasts, fire evacuation indicator lights and fire shutter control modules. When building municipal power fails, the battery starts power supply quickly to keep the fire protection system running continuously and ensure the normal operation of fire early warning, personnel evacuation and fire isolation functions. Adopting flame-retardant shell with short-circuit and leakage prevention design, it features high safety, suitable for security and fire supporting of malls, office buildings, communities and factories, meeting the all-weather emergency power supply requirements of fire equipment.