Comprehensive Life Test for 12 V Automotive Storage Batteries


This SAE Standard applies to 12 V, flooded and absorptive glass mat lead acid automotive storage batteries of 200 minutes or less reserve capacity and cold crank capacity greater than 200 amperes. This life test is considered to be comprehensive in terms of battery manufacturing technology; applicable to lead-acid batteries containing wrought or cast positive grid manufacturing technology and providing a reasonable correlation for hot climate applications. This document is intended as a guide toward standard practice, but may be subject to change to keep pace with experience and technical advances.


The existing test should be revised to include an option to perform the weekly health-check (discharge) at a higher rate. This will allow the failure mode to occur on the cranking event rather than the cycling portion of the procedure, better simulating a real-world failure. Also, the severity of the condition is reduced since the battery failure will occur 1 or 2 weeks earlier.

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