Battery-less implantable device powered by body fluids made
US-based researchers have designed a biological energy storing device which charges using ions from fluids in the human body. The graphene-made "biosupercapacitor" can bend and twist inside the body without any mechanical damage and store more charge than the lithium batteries used in pacemakers. The implant is harmless to the body and could lead to longer-lasting pacemakers, scientists said.