Battery fuel gauge for IoT devices

Advanced battery management for primary and rechargeable batteries

Nordic Semiconductor’s algorithm-based battery fuel gauge solution is an industry unique approach to battery management in IoT devices. It is highly accurate, consumes ultra-low power and does not require any extra components, let alone a dedicated chip. Tools for a streamlined development process enable easy integration of battery state of charge and state of health reporting into the application.

Why choose Nordics’s fuel gauge? 

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Accurate state of charge 
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Precision preserved over the lifetime of the battery
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Ultra-low power and low cost, requiring no extra components
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Accurate state of health 
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Accurate battery capacity and charge cycle tracking for timely replacement
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Fleet battery management via cloud

Why choose Nordic's battery health solution?

Nordic Semiconductor’s algorithm-based battery health solution combines an adaptive battery model with real-time voltage, current, and temperature measurements. By continuously comparing the battery’s original profile with its actual behavior over time, the model enables accurate state of health estimation, tracks charge cycle count and long-term capacity degradation, and maintains accurate state of charge estimates throughout the product lifetime - even as the battery ages. 

Battery health is part of the fuel gauge solution, no dedicated hardware or licensing fees are required. The functionality runs on existing system hardware and requires only minimal flash memory, keeping both system complexity and cost low. 

Key Features

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Capacity tracking

Battery capacity tracking monitors how much energy a battery can actually store compared to when it was new, enabling accurate state of health insight, timely battery replacement, and longer overall product lifetime.  

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Charge cycle count

Tracking how many full charge cycles a battery has undergone, including partial cycles that add up to the battery capacity, providing clear insight into how much usable battery life remains and how performance will evolve.

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Replacement detection

Automatic battery replacement detection identifies when a new battery is inserted and resets the battery model instantly, ensuring capacity, charge‑cycle count, and state of health tracking are accurate from first use - without manual setup or recalibration.  

Device fleet management

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Fuel gauge & battery health integrates seamlessly with Nordic’s cloud lifecycle services - nRF Cloud powered by Memfault. Devices can automatically report state of charge, state of health, and battery‑performance metrics without requiring custom cloud infrastructure. This enables engineering and operations teams to monitor fleet‑wide battery health, identify anomalies, optimize charging parameters, and improve future hardware designs using real‑world data.   

EU directive

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As regulations introduce requirements for battery replacement readiness, state of health capabilities have become essential. Nordic’s state of health solution empowers manufacturers to build more reliable, sustainable, and longer-lasting products while also meeting emerging battery replacement mandates. This includes the European Union Batteries Regulation 2023/1542, which dictates that portable batteries be “readily removable and replaceable by the end-user at any time during the lifetime of the product”