Emergency Lighting
How battery innovation is enhancing emergency lighting
More efficient, easy to recycle and longer-lasting, lithium iron phosphate (LiFePO4) batteries offer several advantages for emergency lighting applications.
M
artin Thompson, technical manager and sustainability lead at Tridonic UK explains why they also represent a practical step for wholesalers when advising their customers with looking to reduce their carbon emissions.
Traditionally, emergency lighting systems have relied on nickel-cadmium (NiCd) and nickel-metal hydride (NiMH) batteries. However, lithium iron phosphate (LiFePO4) is rapidly emerging as a more efficient and popular alternative in the sector. LiFePO4 batteries are now widely regarded as the preferred modern solution for emergency lighting, offering superior performance and additional benefits over older technologies.
Governments and industry bodies are increasingly promoting or even mandating the adoption of technologies that reduce hazardous waste and lower carbon footprints. New regulations, such as the European Union’s Battery Directive, are accelerating the shift away from hazardous materials like cadmium, further supporting the transition to LiFePO4 batteries.
A more sustainable option Unlike NiCd and NiMH batteries, LiFePO4 technology contains no heavy metals, making it safer to handle and more environmentally friendly during end-of-life disposal. These batteries are also recyclable, enabling the recovery of valuable materials such as graphite, iron and copper from electrodes, wiring and casings - significantly reducing ecological impact. Moreover, LiFePO4 batteries are composed of abundant materials that require less energy to extract and process, offering a more sustainable option from the outset.
Another important factor is energy efficiency. LiFePO4 batteries have a significantly lower self- discharge rate, requiring only occasional top-ups instead of the continuous charging needed for nickel-based batteries. They also feature the lowest trickle charge rate among emergency battery options, reducing the energy required to maintain full capacity when not in active use. Compared to LiFePO4, nickel-cadmium batteries consume 54% to 86% more power, while nickel-metal hydride batteries use 15% to 19% more - making LiFePO4 the most energy-efficient choice.
22 | electrical wholesalerAugust 2025
LiFePO4 batteries also offer clear advantages in terms of lifespan and maintenance. With Tridonic solutions, we will soon be offering a design life of up to 10 years and warranty of 8 years, these batteries last about twice as long as nickel-based alternatives, which often require replacement every four years. This extended lifespan significantly reduces the frequency of replacements, benefiting your clients tasked with long-term maintenance planning and budget control.
Additionally, LiFePO4 batteries are known for their robustness and versatility. Their compact size and higher energy density make them especially well-suited for a wide range of LED applications, including emergency lighting. This combination of performance, durability and efficiency makes LiFePO4 an especially compelling option compared to traditional nickel-based solutions.
Despite these numerous advantages, some scepticism around LiFePO4 technology remains, which may stem from cost considerations. While initial costs are higher than nickel-based batteries, the savings realised through lower energy consumption, longer lifespan and reduced maintenance can make LiFePO4 a cost-effective choice in the long run. Given its proven use in everyday devices like mobile phones, laptops and
power tools, LiFePO4 technology is a well-tested and reliable solution.
As part of its commitment to sustainability and innovation, Tridonic had made the strategic decision to end the sale of NiCd and NiMH batteries in the UK in April 2025. This move reflects the company’s broader global strategy and local Tridonic360 strategy to support environmental responsibility and contribute to the circular economy - where products are designed for durability, reuse and recyclability. We are dedicated to delivering safer, more energy-efficient and environmentally friendly sustainable solutions for emergency lighting and beyond.
Conclusion
LiFePO4 batteries mark the beginning of a new era in emergency lighting technology. Without question, they offer the most energy-efficient, environmentally responsible and long-lasting solution currently available. Your clients aiming to reduce operational costs and environmental impact will find LiFePO4 a compelling alternative to traditional nickel-based options. Its durability and efficiency, already demonstrated in everyday electronics, make the transition to LiFePO4 in emergency systems both logical and future focused.
ewnews.co.uk
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