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The pseudo-open-circuit voltage (pseudo-OCV) method is a practical approach for estimating the open-circuit potential (OCP) of intercalation electrodes, such as those in lithium-ion batteries. It enables the derivation of OCP versus stoichiometry functions from low-rate galvanostatic tests and is especially useful in the context of parameterizing physics-based battery models. This article outlines the method’s basis, implementation in half and full cells, and best practices for test protocols and data processing.