This project presented the first biodegradable redox flow battery. This eco-friendly battery approach represents the starting point of my current research line and future research plan. The reported battery is completely made of organic materials such as cellulose, carbon electrodes, beeswax and organic redox species, and can be fabricated by affordable methods with low energy consumption. After used, the battery can be disposed of in an organic waste container or even discarded in the field, because it biodegrades by the action of microorganisms present in soils and water bodies. We have shown that this biodegradable battery can substitute a Li-ion coin cell battery to run a portable water monitoring device. This technology changes the unsustainable portable battery paradigm, from considering it a harmful waste to a source of materials that can nurture the environment, enrich soil or remove toxins from water beyond the ordinary life cycle of a battery.