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SOC value obtained in fuel gauge bq27421-G1A is not accurate

Hi,

 I am using bq27421-G1A fuel gauge and the battery used is Li-ion battery (3000mAh , 3.8 V).

The Following parameters are written to the Data Memory :

Design Capacity, Design Energy, terminate Voltage, Taper Rate , SOCI Delta , Opconfig .

The SOC interrupt is configured for every 1% change in SOC

The battery voltage is read as 3.8 V . But the SOC read is only 10% . 

Why the SOC value is this much low?

Thankyou