As electronic devices keep scaling down, batteries need to find a way to maintain performance under smaller size constraints. Researchers from the University of Illinois at Urbana-Champaign have created an incredibly thin, high-performance, 3D microbattery, which could be the answer to powering individual microchips apart from any separate power source. The research team printed the tiny power source using a technique combining 3D holographic lithography and 2D photo-lithography. The new technique allows for greater control of the electrode's structure; so, the batteries can easily be tailor-made for various applications. The scientists detail the new fabrication technique in their research paper.