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Battery OEM testing

OEM battery testing is what makes a specification real. Chengguang tests every battery at end of line and documents the batch, so the tenth container matches the first approved sample.

End-of-line testing (100%)

  • CCA — cold-cranking performance to the specified test basis.
  • Capacity at C20 — stored energy at the 20-hour rate.
  • Open-circuit voltage (OCV) — catches cell problems before shipping.
  • Leak test — catches a case that would lose electrolyte.
  • Visual — terminal alignment and case integrity.

Batch and type testing

  • C20 capacity to IEC 60095-1.
  • Reserve capacity to SAE J537.
  • Charge acceptance.
  • Vibration checks.

Documentation

Test results travel with the shipment, including a certificate of analysis (CoA) where required. Batch traceability runs from raw material lot to shipping container.

Why it matters

A specification is only as good as the test that proves it. CCA is test-method dependent (JIS at −15 °C vs EN/SAE at −18 °C), so the test basis is confirmed and reported alongside the number.

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Frequently Asked Questions

What is tested on every battery?

100% end-of-line electrical testing — CCA, C20 capacity, open-circuit voltage, leak check and visual inspection.

Are test reports provided with the shipment?

Yes — test results and, where required, a certificate of analysis travel with the shipment, supported by batch traceability.

Why does the CCA test basis matter?

Because JIS tests at −15 °C and EN/SAE at −18 °C, so a CCA number without its basis is not comparable. The basis is confirmed and reported.

Can third-party inspection be arranged?

Yes — SGS, Bureau Veritas, Intertek or your nominated inspection agency are welcome at the factory for pre-shipment verification.