Two researchers from the Chemnitz University of Technology and Leibniz Institute for Solid State and Materials Research Dresden have presented a commentary on the topic “Tiny robots and sensors need tiny batteries – here’s how to do it” in the latest issue of the scientific journal, Nature. Scientists and students also find excellent conditions for interdisciplinary research and study in the field of micro- and nanotechnology at the Center for Materials, Architectures, and Integration of Nanomembranes (MAIN) at Chemnitz University of Technology. Image Credit: Image archive of the Press and Crossmedia Editorial Office/Jacob Müller. This commentary discusses the different types of techniques that can be currently used to produce tiny batteries for use in microelectronics, and also discusses the kind of issues that still need to be addressed, and what is actually significant.