In current government procurement, green environmental protection and efficient fiscal expenditure are core evaluation metrics. As a cornerstone of smart city construction, the battery life of smart ultrasonic water meters directly affects the service life of these assets. The adoption of a "replaceable battery" design brings significant positive impacts to government procurement and public utility management.

First and foremost, it drastically reduces life-cycle costs. The electronic components and metering pipes of ultrasonic water meters typically last for over 10 years, whereas traditional integrated batteries often last only 5 to 6 years. If the battery cannot be replaced, the water meter is scrapped prematurely due to power depletion, resulting in massive fiscal waste. The replaceable battery design achieves the separation of the meter and the power source. Procurement agencies only need to replace the battery periodically to keep the meter in service, greatly extending the equipment's life cycle and saving long-term public funds.

Secondly, it aligns with the circular economy and environmental policies. Government procurement has always promoted green purchasing standards. When water meters with non-replaceable batteries are scrapped, they are extremely difficult to dismantle harmlessly because the battery is sealed within the body, which easily causes environmental pollution. In contrast, replaceable batteries facilitate centralized recycling and professional treatment, reducing e-waste and perfectly fitting national carbon neutrality strategies.

Finally, it enhances the operational efficiency of public services. When the battery runs low, technicians can quickly replace it on-site without dismantling the entire meter or interrupting the users' water supply. This low-cost, highly efficient maintenance model not only ensures the continuity of residential water use but also improves public satisfaction with government services.