EUROCAE announces the publication of ED-312 - Guidance on Determining Failure Modes in Lithium-Ion Cells for eVTOL Applications. This document contains guidance on the definition and detection of lithium-ion cell failures, cell failure causes and materials level failure modes. It also informs on interdependencies between failure causes that may be considered when defining a verification and validation strategy for the cell, as defined in other cell related EUROCAE documents.