Scientists invent micrometers-thin battery charged by saline solution that could power smart contact lenses::Scientists from NTU Singapore have developed a flexible battery as thin as a human cornea, which stores electricity when it is immersed in saline solution, and which could one day power smart contact lenses.
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Very cool technological achievement, but eye-batteries don’t necessarily sound all that safe, non-corrosive/toxic or not, it’s still a constant reaction to create and store electricity in a very vulnerable location.
