An induction-based energy harvesting (EH) device was presented. It converted part of the rotational energy of magnetic stirrers back into electrical energy, making it accessible for electrochemical transformations. After rectification, the induced AC voltage was optionally provided as a constant voltage or constant current whereby the available voltage could directly be adjusted by the stirring rate of the reaction. The comparability of the results with reactions carried out with commercial power supplies has been demonstrated on six different late-stage functionalization, including methylation, carboxylation, trifluoromethylation, imidation, hydrolysis, and keto-olefin coupling. Therefore, the described EH device is a low-cost, resource-efficient alternative to a commercial electrochemical set-up and enables laboratories without specialized equipment to perform electrochemical reactions.