Vehicle Battery & Alternator Diagnostics

How does a handheld digital Conductance Battery Tester measure Cold Cranking Amps (CCA) without applying a massive heat load?

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 Correct IncorrectIt injects a low-frequency AC test signal across the battery plates to measure conductance and internal impedance, then estimates available CCA quickly.

How does a handheld digital Conductance Battery Tester measure Cold Cranking Amps (CCA) without applying a massive heat load?

• It injects a small AC signal to estimate CCA from battery conductance and internal resistance
• It measures the weight of the sulfuric acid
• It heats the battery to 150°F with toaster coils
• It checks the date stamped on the plastic sticker