A Battery Fueled By You
By Michael V. Copeland

(Business 2.0) – The technology that boosts the Voyager spacecraft will soon land in the human body. With help from NASA, Biophan Technologies is developing a biothermal battery for pacemakers and other implantable medical devices. Like Voyager's power source, it exploits differences in temperature to generate electricity. The Voyager version produces energy when the cold of space meets hot plutonium. In Biophan's postage-stamp-size battery, one side is heated by the body's core while the other side draws cooler temperatures from near the skin. Energy is produced at the junction of the two surfaces. That could extend the life of pacemaker batteries from eight years to 30. CEO Michael Weiner expects to shop a prototype within a year and capture a chunk of the $500 million global market for implantable batteries. — MICHAEL V. COPELAND