Miniature Battery Powered by Tears and Glucose

Scientists at Nanyang Technological University in Singapore have developed a battery the size of a human cornea that can be powered by tears or glucose. The battery avoids the dangers of explosive conventional batteries by using tear solution as its power source. By coating the battery electrode module with an enzyme that reacts with glucose, the battery is able to charge using glucose dissolved in the tear solution. Although the battery is limited in its capacity due to its small size, researchers are considering applications such as smart lenses and other health monitoring devices.