The rise of low power IoT batteries: key technologies in 2025
In an increasingly connected world, the Internet of Things (IoT) is transforming industries, cities, and daily lives. From smart sensors in agriculture to industrial monitoring systems, the expansion of IoT devices hinges on one critical component: the battery. For many IoT applications, especially those deployed in remote or hard-to-reach locations, the ability to operate autonomously for extended periods—often years—without intervention is paramount. This necessitates the development and adoption of low-power IoT batteries, designed to deliver consistent performance while minimizing energy consumption.
Current battery technologies for low-power IoT
The foundation of low-power IoT lies in battery technologies capable of delivering stable power over extended periods, often with minimal or no human intervention. While various chemistries exist, lithium-based batteries have emerged as the preferred choice due to their superior energy density, high voltage, and ability to operate across a wide range of temperatures.
Primary lithium batteries: the foundation of long-life IoT
Primary (non-rechargeable) lithium batteries are ideal for IoT devices requiring exceptionally long operational lifespans, often exceeding 10 or even 20 years, without the need for recharging or replacement. Their low self-discharge rates and stable voltage output make them perfect for 'set-and-forget' applications.
- Lithium-Thionyl Chloride (Li-SOCl₂): Renowned for its high nominal voltage (3.6 V) and impressive energy density, this chemistry exhibits very low self-discharge. Saft’s LS, LSH, and LSP series are based on this technology, offering robust performance in extreme temperatures (-60°C to +150°C), making them ideal for smart metering and trackers.
- Lithium-Manganese Dioxide (Li-MnO₂): Operating at 3.0 V, this chemistry offers a good trade-off between energy and power. Saft’s LM/M cells feature good pulse capability, making them suitable for smart metering, parking sensors, and smart farming applications.
Rechargeable lithium-ion batteries: powering dynamic IoT
Rechargeable Li-ion batteries are crucial for IoT devices that require frequent recharging or higher power delivery. Saft’s MP and VL series are designed for very long cycle-life even in harsh conditions, incorporating advanced safety features. While the initial cost may be higher, their high cycle count and low maintenance significantly reduce the cost per cycle.
Key Takeaways:
- Primary lithium batteries (Li-SOCl₂, Li-MnO₂) are the foundation for long-life, low-maintenance IoT devices.
- Rechargeable Li-ion batteries offer flexibility and a low total cost of ownership for dynamic, high-power applications.
- Saft provides a comprehensive portfolio of both primary and rechargeable solutions to meet diverse IoT needs.
Emerging trends and future outlook in IoT batteries
The landscape of low-power IoT batteries is continuously evolving, driven by the demand for smaller, more powerful, and longer-lasting devices. Key trends include advancements in solid-state battery technology, which promises higher energy densities and enhanced safety, and the miniaturization of power sources like thin-film and micro-batteries. Additionally, energy harvesting solutions (solar, thermal) are being explored to supplement battery life, further extending device autonomy.
Key Takeaways:
- Solid-state batteries are an emerging technology promising greater energy density and safety.
- Miniaturization is leading to the development of thin-film and micro-batteries for compact devices.
- Energy harvesting technologies are being integrated to supplement and extend battery life.
Saft's expertise in low-power IoT battery solutions
With over a century of innovation, Saft is a leading authority in providing robust and reliable battery solutions for the IoT. Their expertise is demonstrated through a comprehensive portfolio, extensive support services, and a proven track record of success.
Saft delivers exceptional performance, quality, and longevity, with solutions designed for the rigorous demands of industrial and critical IoT environments. They offer crucial services like lifetime estimation and fleet analysis, ensuring optimal performance throughout a product's life. A testament to their capability is the success of Xtel Wireless, which saw a 30-40% improvement in battery capacity and an 8-10 year lifetime for their IoT devices after integrating Saft’s primary lithium batteries.
Key Takeaways:
- Saft offers a complete portfolio of high-performance primary and rechargeable batteries for IoT.
- Their expertise extends to comprehensive support services, including lifetime estimation and fleet analysis.
- Proven success stories, like Xtel Wireless, demonstrate Saft’s ability to deliver long-lasting, reliable power.
Real-world applications: where low-power IoT batteries shine
Application Domain | Use Case Examples | |
| Smart Cities | Smart metering (water, gas, electricity), parking sensors, environmental monitoring. | LS, LSP, LSH, LM/M Series |
| Agriculture | Soil moisture sensors, crop health monitoring, livestock tracking. | LS, LSP, LSH, LM/M Series
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| Industrial Monitoring | Predictive maintenance sensors, asset tracking in oil & gas, remote infrastructure monitoring. | LS, LSP, LSH, LM/M Series
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| Tracking | Logistics and supply chain container tracking, vehicle telematics, personal asset trackers. | LS, LSP, LSH, LM/M Series
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The expansion of IoT devices is inextricably linked to advancements in battery technology. Low-power IoT batteries are enablers, extending the reach and utility of connected devices. Saft, with its deep heritage and comprehensive portfolio, plays a pivotal role in this evolution, providing advanced and dependable power solutions needed to power the next generation of intelligent, connected devices.
To ensure the best fit for every application, we work closely with application engineers who thoroughly analyze the full customer profile, including budget constraints, available space within the client’s design, current profiles, ATEX classification, environmental conditions (hot/cold, vibration, pressure), and expected product lifespan, to deliver the most suitable solution for every need.
Frequently Asked Questions (FAQ)
Primary batteries (like Li-SOCl₂) are non-rechargeable and designed for very long-life, low-maintenance applications (10-20 years). Rechargeable batteries (Li-ion) can be charged multiple times and are suited for devices with higher power needs or frequent use.
Li-SOCl2 batteries offer a high voltage, very low self-discharge rate, and a wide operating temperature range. This ensures they can power a smart meter reliably for over a decade without needing replacement.
Saft provides comprehensive support, including lifetime estimation services that help developers predict battery performance in their specific use case, ensuring they select the optimal solution for longevity and reliability.
Saft’s rechargeable Li-ion batteries are designed for a very long cycle life, even in harsh outdoor or industrial conditions. They incorporate advanced safety features and offer a low total cost of ownership due to their durability and low maintenance needs.