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After reviewed the Functional test spec for the complete unit, and battery datasheet, we found the difference.
i.e: Functional test spec requirement: 3.1 ~ 3.3 V, however battery spec: nominal 3V. The failed battery measured at 3.08 V.
This issue already feedback to customer, and he agreed to change the test spec, according to battery data sheet. Problem solved!
Anyway, thanks to the covers, giving insightful opinions to me. Really appreciated!
i.e: Functional test spec requirement: 3.1 ~ 3.3 V, however battery spec: nominal 3V. The failed battery measured at 3.08 V.
This issue already feedback to customer, and he agreed to change the test spec, according to battery data sheet. Problem solved!

Anyway, thanks to the covers, giving insightful opinions to me. Really appreciated!
