Is your cellphone running low on battery? Why not charge it up…using your waste produced in the bathroom.

Researchers have found a way to charge a smartphone using urine, releasing the potential to produce a reliable, renewable energy source.

According to the BBC, researchers at the Bristol Robotics Laboratory have created the first way to generate electricity from urine.

They were able to charge a Samsung smartphone by passing water through a cascade of microbial fuel cells (MFCs).

The MFCs use the metabolism of live micro-organisms to convert the organic matter (urine) into electricity.

With the charged phone, they were able to send text messages, browse the web and make a phone call – a brief call, at that.

The phone wasn’t completely charged, however. That’s the next step…

“The beauty of this fuel source is that we are not relying on the erratic nature of the wind or the sun, we are actually re-using waste to create energy,” researcher Dr. Ioannis Ieropoulos told the BBC.

But maybe it’s not just your smartphone that can be charged during your bathroom breaks. There’s the potential to use urine to charge more bathroom-related things, such as hair dryers, razors, lights, etc.

But keeping our gadgets charged has always been the main challenge that many of us deal with. A dead smart phone is as useful as a seatbelt on a bicycle.

Solar chargers exist – and they work. I’ve tried the Goal Zero Nomad 7 and it works great. But by the time it gets a charge, you’ll have a sunburn.