This genuine Panasonic CPU board battery is custom-manufactured for Q.SONIC PLUS series flowmeters, providing stable 3.6V lithium power supply to ensure uninterrupted CPU data storage and system configuration retention during unexpected power cuts. Boasting a 10-year service life at -20°C to 60°C operating temperature, it adopts a leak-proof hermetic structure, fits the original Q.SONIC PLUS flowmeter circuit board perfectly, avoids data loss risks, and guarantees long-term reliable operation of flow metering systems.