MAX17055 is equipped with Panasonic NCR model, yet the precision of this model is not as high as the common lithium-ion battery. It you need more precise measurement, the battery needs to be characterized.
The following is a snippet of the MAX17055 datasheet.
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Other ModelGauge m5 fuel gauge datasheets (MAX17201/11, MAX17205/15, MAX17260 - MAX17263) also recommend custom model for NCR cells for best performance.