NORVI is proud to announce the launch of the M12-B series battery-powered NB-IoT data logger, a breakthrough in remote utility monitoring. Designed for water, gas, and other utility applications, this device combines long-lasting battery life, rugged design, and reliable connectivity, offering a truly maintenance-free solution for developers and operators.
Long-Life Battery: Over 5 Years of Continuous Operation
At the heart of the NORVI M12-B is a high-capacity, energy-optimized battery designed to power the device for more than five years without any maintenance. This means utilities and industrial operators can deploy telemetry devices in remote or hard-to-reach locations without worrying about frequent battery replacements. Developers can explore the life estimation to see real-world battery performance data and plan deployments with confidence.
Power Consumption Analysis: How NORVI Achieves Multi-Year Operation
The long battery life of the M12-B is made possible by careful power optimization across two main stages:
Modem Initializing and Data Sending Stage
During the active phase, the device performs critical operations such as:
- Initializing the NB-IoT modem
- Connecting to the network
- Reading the DJLK ultrasonic level sensor via RS-485
- Transmitting data packets to the ThingsBoard cloud over MQTT
On average, the system draws 31.78 mA for about 70 seconds. The SIM7070 LTE modem generates high-current spikes up to 0.56 A, which are handled by two lithium batteries connected in parallel.
A 1000 µF tantalum capacitor placed near the modem acts as a local energy reservoir, supplying instantaneous surge current, while the batteries maintain the average load.
According to the ER34615H(D) lithium battery datasheet, each cell can safely deliver 300 mA pulses for 100 milliseconds every 2 minutes. Observed modem pulses (30–40 milliseconds) stay within this safe operating range, ensuring reliable initialization without battery stress.
MCU Sleep Mode (Shutdown Mode)
After data transmission, the MCU enters shutdown mode, powering down most peripherals and system clocks. Only the Real-Time Clock (RTC) remains active to track time.
In this low-power state, the system draws approximately 1.22 µA for a duration of 15 minutes.
Battery Life Estimation
EC-M12-BC-C6-C consists of two 19,000 mAh . So it has a total of 38,000 mAh battery power. As for the above collected data we have obtained battery life estimation when data is sent every 15 minutes and every 1 hour.
Below shows the formula to calculate average current and battery life for different intervals which help you to estimate the battery life for your application.
Overall System Power Profile
The average current flow across the full duty cycle is about 2.39 mA, with a charge consumption of 2.24 C, supporting multi-year operation on battery without maintenance.
Reliable NB-IoT Connectivity
The M12-B leverages NB-IoT Cat NB1/NB2 connectivity, providing stable and secure data transmission even in challenging environments. Its deep coverage ensures that basements, underground meters, and remote infrastructure remain connected, while its low-power design ensures long-term operational efficiency.
Rugged and Flexible Design
Built for demanding utility environments, the NORVI M12-B is IP67-rated, fully protected against dust and water. It supports a wide range of sensors, including:
- Flow meters and pressure sensors
- Pulse counters
- Analog voltage/current inputs
- RS-485 Modbus RTU devices
This flexibility allows developers to integrate the device with existing infrastructure or design custom telemetry solutions with ease.
Maintenance-Free Deployment
The combination of long-life battery, rugged housing, and NB-IoT connectivity enables true maintenance-free deployments. Once installed, the M12-B operates autonomously for 5+ years, transmitting real-time data without the need for field intervention. This drastically reduces operational costs and human resources, making it ideal for large-scale utility networks.
Custom IoT Solutions and White-Labeling
Looking to bring your own IoT product to market? NORVI offers end-to-end custom IoT product development, from hardware design to cloud integration. Whether it’s a smart water meter, gas monitoring solution, or industrial controller, our team can turn your ideas into reliable, ready-to-market products with NB-IoT, LoRaWAN, or Wi-Fi connectivity.
Need a white-label solution? NORVI’s offerings let you launch branded IoT devices quickly, while we handle engineering, design, and manufacturing. Focus on your business, while we provide proven, maintenance-free devices optimized for long-term performance.
Accelerate your projects further with rapid prototyping, flexible sensor interfaces, and developer-friendly platforms, ensuring seamless integration and faster time-to-market.
Conclusion
The NORVI M12-B NB-IoT Data Logger sets a new standard for utility telemetry. With 5+ years of maintenance-free operation, rugged IP67 design, and optimized power consumption, it empowers developers and businesses to deploy scalable, reliable, and long-term monitoring solutions.
Explore the life estimation for battery performance and plan your deployments with confidence. NORVI makes smart utility monitoring maintenance-free, developer-friendly, and ready for real-world applications.
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