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Ultra-high precision coulometry (UHPC) and associated battery cell testing techniques requiring precision and accuracy beyond the capabilities of conventional testers are typically used to quickly assess lifetime capability and cell performance.

The method presented here leverages user defined variables to perform internal resistance measurements on a NOVONIX UHPC system.

As of v2.6.0, UHPC Protocol supports creating and updating variables or math expressions to trigger conditions within the 'Step Control Conditions' and 'Current' text boxes. This document outlines how to get started implementing these custom conditions in your test protocols.