MESH-BAT aims to explore a novel architecture for solid-state lithiumion batteries, enabling a new generation of miniature, ‘formable’ batteries that can be squeezed into shapes that are unthinkable using traditional battery architectures. The need for miniature batteries is linked to the exponential rise in the demand for Internet of Things (IOT) devices, medical implants (sensors, smart pills, smart lenses etc.) and wearable electronics. While the micro-electronic components controlling these devices have improved at rapid pace, suitable batteries are lacking. Conventional rechargeable batteries are bulky, and made by stacking slurry-casted electrode layers separated by a membrane inside a fixed-form container, causing severe limitations in device design. Medical device companies indicate that they are in fact forced to design their product ‘around’ whatever fixedform-factor battery that is available in the market. Ideally, the battery design could be adapted to the device design, and could be ‘squeezed’ into the available space within the device. Unfortunately, conventional battery architectures easily fail upon deformation, e.g. due to cracking or delamination of the electrode layers. Printed or thin film batteries could be an option for small volume devices, but their low areal capacity limits their use to low-power niche applications. In view of these limitations, MESH-BAT aims to provide a solution for future generations of wireless electronics where power sources can be potentially integrated into a small and form-factor-free footprint without compromising the energy demand. To do so, deposition methods from micro-electronics (anodization, electrodeposition, spray coating and atomic layer deposition) will be explored to fabricate the novel electrodes. The performance optimization of individual electrodes and cells will be assisted by several ex situ and in situ characterization techniques and physics-based modeling.