Industrial production and testing equipment have extremely high requirements for power supply stability. As an industrial standby energy storage device, the 12V33Ah lead-acid batteries, effectively avoids equipment shutdown and data loss caused by power outages. With a sealed and leak-proof design, it adapts to complex temperature and humidity environments in industrial workshops, resisting slight temperature differences and dust interference, and meets standby energy storage needs of production line testing equipment, data acquisition instruments and small industrial control systems. Its 33Ah large capacity supports stable operation of small and medium-sized industrial equipment for several hours, ensuring zero data interruption and sudden equipment stop. Its maintenance-free feature reduces industrial operation and maintenance costs with stable service life.