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WEBENCH® Tools/BQ40Z50-R2: battery charging with bq40z50r2

Part Number: BQ40Z50-R2
Other Parts Discussed in Thread: BQ40Z50

Tool/software: WEBENCH® Design Tools

Hi,

 In NCR18650PF Specification, the battery Nominal voltag is 3.7V. In charging, the voltage reach to 7.3V(2 series in use), the gauge display 100%. but it`s not full. when the battery voltage reach to 8.2V, The FC flag is set. My question is:

1. is it safe to battery for the high voltage?

2.is it right of the gauge display?