ananyo (2519492) writes "A new lithium-ion battery is one of the smallest ever made and the first battery to be created with a three-dimensional printer. Measuring less than a millimetre on each side, it fits comfortably on the head of pin and could potentially power tiny medical devices or miniature robots.
The final product weighed less than 100 microgrammes. Yet it stored almost as much energy, gram for gram, as larger lithium-ion batteries that run laptops and electric cars. And the power it dished out, 2.7 milliwatts per square centimeter of area covered, rivalled the capabilities of other cutting-edge microbatteries developed in recent years."
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