The innovative battery uses a biocompatible saline solution, eliminating traditional lithium-ion batteries that contain flammable materials. It can be charged conventionally or chemically by immersing it in a saltwater solution where glucose reacts with sodium and chloride ions to charge the battery. In particular, tears containing glucose can also charge the battery while the lens is worn.
Currently the battery output voltage is between 0.3 and 0.6 V, which is lower than the standard 1.5 V for AA batteries. Although this power is not enough to power advanced functions such as data storage or internet connectivity, the team is working to increase the capacity and voltage of the battery.
One promising application of this technology is in healthcare, especially for diabetic patients who monitor their glucose levels daily. Lee suggests that smart contact lenses will detect glucose levels while worn.
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Source: Ferra
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