The battery powered by stomach acid

A tiny sensor capable of transmitting information from inside the body and powered by stomach acid has been unveiled by US scientists. The device was tested in a pig over the course of a week wirelessly transmitting its body temperature every twelve seconds to an external receiver. The MIT and Harvard-based team behind the work, which was published this week in Nature Biomedical Engineering, say this represents a step towards safer, cheaper ingestible sensors that could even be used to dispense drugs inside the body. Dr Giovanni Traverso of the Brigham and Women's Hospital at Harvard Medical... Like this podcast? Please help us by supporting the Naked Scientists