Can a Plant Pot Charge Your Phone? The Bioo Claim Explained

A Plant-Powered Phone-Charging Concept and Its Performance Claim

Can a houseplant really charge your phone? In 2016 a short video from Futurism, shared widely after a ScienceAlert post, said yes: a plant pot called Bioo would top up a smartphone through the power of photosynthesis, as long as you kept watering it. The honest answer is more modest. Living plants can help produce a small electric current, and the science behind it is real, but the amounts involved are tiny compared with what a phone needs.

Here is what the product claimed, how plant-powered electricity actually works, and how to judge similar gadgets when they appear.

Video produced in partnership with Futurism. Based on ScienceAlert.

What the Bioo plant pot promised

Bioo Lite was developed by Arkyne Technologies, a start-up based in Barcelona, and launched on the crowdfunding site Indiegogo in spring 2016. The Next Web reported an early-bird price of about $112 and a plan to start shipping at the end of 2016. The campaign passed its €15,000 goal quickly; by early May, The Register said it had raised more than €61,000 from over 400 backers.

The marketing was bold. According to SlashGear and The Next Web, the creators said the pot could charge a phone two or three times a day, keep working at night (unlike a solar panel), and fit on a desk. The USB port was hidden inside a fake stone sitting on the soil. Setup was described as adding water, shaking the pot, then planting as normal.

How a plant can make electricity

The plant itself does not produce a current. The idea is a type of microbial fuel cell. During photosynthesis, a plant pushes some of its sugars and other organic compounds out through its roots into the soil. Certain soil bacteria feed on these compounds, and as they break them down they release electrons. If an electrode (the anode) sits where the bacteria live and a second electrode (the cathode) sits where oxygen is available, those electrons can flow through a wire between them. That flow is electricity.

The principle is more than a century old. The scientist Michael Cressé Potter generated a current from microorganisms in 1911, and researchers have since built microbial fuel cells that run on wastewater, sediment and, in the plant version, wetland species such as reeds and rice. Bioo described its design in similar terms: bacteria in compartments under the plant, a membrane, an anode, and a "nanowire" network collecting the electrons into a small battery.

The numbers that matter

The weak point is power. The Register noted that Bioo's own figure was a peak of 0.8 watts, depending on how well the plant was cared for. A basic phone charger delivers around 5 watts, so even the peak claim was about a sixth of an ordinary plug.

A quick sum shows the gap. A typical smartphone battery holds somewhere around 10 to 15 watt-hours. At a steady 0.8 watts, with no losses at all, one full charge would take roughly 12 to 19 hours. Charging the phone three times a day would need several times more power than the pot said it could produce at its best, and real-world output from bacteria is rarely steady. For comparison, a 2013 Bristol Robotics Laboratory experiment with bacteria fed on urine produced about 2.5 milliwatts, hundreds of times less than Bioo's claimed peak.

That is why The Register greeted the campaign with open scepticism, and why claims like "eternal battery" should be read as marketing. Bioo's team attributed the output to "natural chemical enhancers" supporting the plant, but did not publish independent test data to back the figures up.

Where plant power does make sense

None of this means the technology is useless. Microbial fuel cells are good at producing small, steady trickles of energy for a long time, which suits low-power devices: environmental sensors, small lights, or monitors in remote places where changing batteries is a chore. Researchers also study them for treating wastewater while recovering a bit of energy. The challenge, according to the scientific literature summarised on Wikipedia, is that power does not scale up easily as electrodes get bigger, and some systems need expensive membranes or mediators.

So a plant pot that runs a soil-moisture sensor or a small LED is realistic. A plant pot that replaces your phone charger is not, at least with the technology shown in 2016.

How to judge "green charger" claims

Ask for watts and watt-hours. "Charges your phone" means little without a power figure and a charging time.
Look for a built-in battery. Low-power sources usually trickle into a battery, and the battery size limits what you get out.
Check for independent tests. Crowdfunding pages and launch videos are promotional; reviews from people who measured the output are worth more.
Compare with solar. A small solar panel in good light usually delivers far more than any living-plant system shown so far.

The appeal of Bioo was real: a desk plant that quietly gives something back. The science behind it is genuine and still developing. But for now, the plant on your windowsill is better at cleaning up the look of a room than at charging the phone next to it.

Sources: The Register, May 2016; The Next Web, April 2016; SlashGear, April 2016; ScienceAlert, May 2016; Wikipedia: Microbial fuel cell. Image: Bioo team.

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