One battery that recharges with tears was created to power smart contact lenses. The material is extremely thin and can store electricity, being the solution for the future of this technology that can be used with augmented reality or in medical treatments.
According to researchers, these smart contact lenses have advanced and can contribute to many areas, but its battery still lacked a device capable of transferring energy with ease.
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Thus, Lee Seok Woo, the researcher who led the study, explained that all battery research was moved by an initial question: “Contact lens batteries could be recharged with our tears?"
From this, they listed the elements necessary to produce the lowest rechargable battery for the lenses. The result was the development of a safe battery made from biocompatible materials, less than a millimeter thick.
The incredible experiment has a glucose coating and interacts with chloride and sodium ions. After analysis, they discovered that the battery can be powered by the sodium and potassium present in tears.
(Image: Nanyang Technological University/Reproduction)
The need for the development of batteries was caused by the fact that smart contact lenses can display information directly on the corneas, providing a high level of immersive technology.
Furthermore, the same method can be used to correct vision and other medical treatments, monitoring the health of patients.
According to those responsible for Nanyang Technological University, a technology center in Singapore, such lenses will be able to transmit and record content in the future, storing the data in the cloud.
However, one of the obstacles to developing this technology was, precisely, its charging capacity. Thus, Professor Lee Seok Woo's project brought a safe and powerful battery model to power the lenses.
Additionally, the researchers resolved the issue that prevented the material from transmitting power wirelessly:
“By combining the battery and biofuel cell into a single component, the battery can be charged alone without needing additional space for wired or wireless components,” said Li Zongkang, contributor at search.
Therefore, the battery needs water and glucose to produce energy. Therefore, Professor Woo explains that, above all, they are a great alternative to using conventional models, as they do not harm the environment or people's health.
