IEC 60095-1: Lead-Acid Starter Batteries — The Power Behind Every Vehicle Start

CCA Rating: Why -18 °C for 30 Seconds Is the Ultimate Battery Test

IEC 60095-1:2018 specifies lead-acid starter battery performance requirements. The CCA (Cold Cranking Amps) rating on every car battery label comes directly from this standard.

CCA test conditions: At −18 °C, the battery must discharge for 30 seconds while maintaining terminal voltage above 7.2 V — simulating the harshest condition: starting an engine on a freezing winter morning. A battery rated CCA=600 A must deliver 600 A for 30 seconds under these conditions — with electrolyte viscosity increased and chemical reaction rates slowed by the cold, this is a severe test.

The Start-Stop revolution: A traditional starter battery needs to deliver high current only a few dozen times in its entire life. A Start-Stop vehicle battery undergoes hundreds of discharge cycles per day, requiring deep-cycle endurance — the direct reason AGM (Absorbent Glass Mat) and EFB (Enhanced Flooded Battery) technologies were developed. IEC 60095-1:2018 added dedicated test methods for both types.

TN Lab — Every engine start is a silent verification of the IEC 60095-1 standard.