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BQ40Z50-R2: SOH accuracy

Part Number: BQ40Z50-R2

Hello Sir:

The SOH calculation method is FCC/Design capacity.

During the life cycle of the battery pack, will the calculation of the SOH value decrease from 100% to 0%.

Does the SOH value will jump or not during the life cycle process?

Example: cycle 1 is 100%, cycle 2 is 99%, cycle 3 is 98% and cycle 4 is 100%.

Is it possible happen? If it is possible can you provide us recommendations for us that how to let the SOH keep smooth and don't get back?

Thank you very much.