Algae battery breakthrough from Cambridge researchers 2026

Key Points

• Cambridge researchers have developed a living algae system that generates continuous electricity for low-energy devices.
• The biocell technology uses photosynthetic cyanobacteria and has operated for more than six years without replacement.
• The system generates electricity 24/7, including in darkness, by harnessing electrons from photosynthesis and respiration.
• The technology targets small disposable batteries used in remote controls, smoke alarms, and IoT sensors.
• The biocells are made from common, inexpensive, and largely recyclable materials.
• The research team includes Dr Paolo Bombelli, Professor Chris Howe, bio-designer Lucia Giron, and electrical engineer Lifu Tan.
• A startup company called e-Pho has been established to commercialise the technology.
• The power output remains low, limiting current applications to low-energy devices.
• The team has increased biocell power output more than 20-fold since research began in 2006.
• Educational workshops using a ‘living toolkit’ have been developed to inspire future scientists.

Cambridge (Cambridge Tribune) August 01, 2026 – Researchers at the Department of Biochemistry at the University of Cambridge have developed a living algae system capable of powering low-energy electronic devices without harming the organisms involved. This ‘biocell’ technology can produce electricity continuously for as long as the system remains alive, with some experimental units operating for more than six years. The breakthrough represents a potential alternative to millions of small disposable batteries currently used in everyday electronics.

As reported by the University of Cambridge’s press office, Dr Paolo Bombelli, who leads the scientific research behind the project, stated:

“We’ve found a way to tap into a natural process in algae, and use it to generate continuous electricity 24/7 without harming the plant at all.”

The technology harnesses the natural flow of electrons produced by living cyanobacteria during photosynthesis and respiration, allowing it to produce a steady electrical current around the clock.

What Is the Living Algae Biocell Technology?

The algae used in the system are photosynthetic cyanobacteria, ancient aquatic microorganisms that harvest sunlight and take carbon dioxide from the air to power their growth. This biological process involves a continuous flow of electrons, essentially electricity, and the Cambridge team has worked out how to tap off a fraction of this flow to power electrical devices.

The algae live within a sealed casing, and their photosynthesis produces a low-power electrical current that keeps flowing even in the dark. As it is based on a living organism, this biocell technology can keep producing electricity for as long as the team can keep it alive. According to Dr Bombelli, as quoted by the University of Cambridge:

“This is a completely new way to generate electricity that has the capacity to run and run – even when there’s no light at all – making it a much greener, longer-term alternative to traditional chemical batteries.”

Why Could This Replace Disposable Batteries?

Professor Chris Howe, Principal Investigator of the project in the Department of Biochemistry, stated as reported by the University of Cambridge:

“Disposable batteries, which you just throw away when they stop working, are very bad for the planet and we want to use our biocells as a replacement.”

Conventional chemical batteries are built with mined materials like lithium that cause a range of environmental issues. Extraction methods are energy-intensive, release greenhouse gases and cause local ecological degradation and habitat destruction.

In contrast, the biocells are made of common, inexpensive and largely recyclable materials. The power output of the biocells is low, so the technology cannot be used for devices that need lots of power. The team’s idea is to use it to power large numbers of devices that would normally be powered using small, disposable batteries, for example remote controls or smoke alarms.

As Professor Howe stated, according to the University of Cambridge:

“Our technology could replace millions of small disposable batteries with a much a cleaner source of energy – that’s a huge environmental benefit and a really exciting prospect.”

How Does the System Generate Electricity in Darkness?

One of the technology’s most notable features is that it continues generating electricity even in complete darkness. During daylight, cyanobacteria convert sunlight into chemical energy through photosynthesis. At night, they switch to respiration, breaking down the energy they stored during the day to stay alive. That process also releases electrons, allowing the biocell to continue producing electricity around the clock.

What Applications Are Being Developed?

The research team has teamed up with bio-designer Lucia Giron and electrical engineer Lifu Tan to convert their biocell technology into viable products. To begin with, the collaboration has developed a digital clock that runs on electricity generated by the algal cell. Another product is a temperature sensor interface that monitors environmental conditions.

As reported by the University of Cambridge, Mr Tan stated: “We have sensors measuring light intensity around the plant, air temperature and soil moisture – all powered continuously by our biocell.” “We can look at this data on a connected phone app to know exactly what the plant needs, for example when to water it, so we can keep it thriving.”

The team has also spun off their research into a startup called e-Pho, which is working on developing client-specific applications using the algal cell technology. According to Dr Bombelli, as quoted by the University of Cambridge: “Knowing how the technology works is one thing, but transforming it into a product is a very different ball game.”

Where Could This Technology Have the Greatest Impact?

The technology holds promise for electricity provision in rural, off-grid locations. Professor Howe, as reported by the University of Cambridge, said that providing readily available power in low-income countries could be life-changing. In sub-Saharan Africa, for example, mobile phone ownership and coverage is wide, but charging facilities can be very limited in remote rural areas. If the technology can be scaled up to charge mobile phones, this improves not only communication, but access to information and online tools.

The team also sees potential to use biocells to power environmental sensors, for example to monitor water quality in remote locations. These require a long-lasting, uninterrupted supply of power and, as they are often in hard-to-access locations, must run reliably without human intervention to change batteries when they run out.

How Has the Research Progressed Over Time?

The project is the result of nearly two decades of research led by Dr Paolo Bombelli and Professor Chris Howe in the University of Cambridge’s Department of Biochemistry. Work on the technology began in 2006, driven by a question of whether living organisms could continuously generate electricity without being damaged.

Since the team set to work in 2006, a number of other teams across the world have begun investigating similar ideas, but Professor Howe says his has a march on them. As reported by the University of Cambridge, Professor Howe stated: “We’ve been one of the most significant places in the world for development and research into this technology, and our continued experiments and refinements have enabled us to increase the power output of the biocell over 20-fold since we started.”

In May 2022, the university said researchers had used Synechocystis, a non-toxic species of blue-green algae, to power a microprocessor continuously for a year using only ambient light and water. The device was described as about the size of an AA battery.

What Educational Initiatives Have Been Developed?

Alongside their commercial work, the Cambridge researchers have developed a ‘living toolkit’ and dedicated website that they use to run very popular classroom workshops in secondary schools. They also run smaller community events, such as Makespace workshops, for adults.

As reported by the University of Cambridge, Dr Bombelli stated:

“School pupils love the chance to build a fully functional system step by step, to grow the algae and run their own experiments.”

“They learn how the system works and how the materials they use affect the results, and they get an insight into different subject disciplines – from biology and electronics.”

Professor Howe, according to the University of Cambridge, added:

“My view is that the school plant science curriculum isn’t very inspiring or contemporary.”

“We want to give schools something that demonstrates the significant applications of plant science in the modern world. Hopefully our workshops will inspire more interest in plant science, and encourage more young people to study it at university and have careers in it.”

Background of the Development

The Cambridge algae power research emerged from growing concerns about the environmental impact of disposable batteries and the need for sustainable energy solutions for low-power devices. Manufacturing disposable batteries is an energy-intensive process that requires the mining of minerals, which degrades local habitats and ecosystems. The research team recognised that billions of small disposable batteries are used annually in low-power electronics, collectively generating enormous quantities of battery waste.

The project builds on earlier work in biophotovoltaics, a field that uses living microorganisms to convert light into electricity. Previous research had demonstrated that algae could generate electricity, but the Cambridge team’s breakthrough lies in achieving continuous operation for extended periods without harming the organisms. The six-year operational record represents a significant milestone in proving the technology’s viability for practical applications.

The collaboration with bio-designer Lucia Giron and electrical engineer Lifu Tan, supported by grants from the University’s BBSRC Impact Acceleration Account, marks a transition from laboratory research to product development. This reflects a broader trend in academic research towards commercialising sustainable technologies.

Prediction: How This Development Could Affect the Consumer Electronics Industry

The living algae system developed at Cambridge could fundamentally reshape how low-power consumer electronics are powered over the coming decade. If the technology achieves commercial viability, manufacturers of remote controls, smoke alarms, digital clocks, and IoT sensors could transition away from disposable batteries, reducing both production costs and environmental liabilities.

For consumers, this could mean devices that never require battery replacement, eliminating a recurring expense and reducing household waste. The environmental impact could be substantial, with millions of disposable batteries potentially removed from the waste stream annually.

However, the technology’s current low power output limits its immediate applicability to energy-intensive devices. The industry impact will depend on whether power output can be increased sufficiently to compete with conventional batteries on performance as well as sustainability.

In developing regions, particularly sub-Saharan Africa, the technology could improve access to mobile communication and information services by providing sustainable charging solutions where grid electricity is unreliable or unavailable. This could accelerate digital inclusion and economic development in underserved communities.

The educational initiatives accompanying the research may also influence the next generation of scientists and engineers, potentially increasing interest in plant science and sustainable energy technologies. This could have long-term effects on the talent pipeline for green technology sectors.