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Full Charge Capacity (FCC) and Remaining Capacity (RM) are both compensated values which depend on the rate, temperature, and impedance of the battery. This is different from Full Available Capacity (FAC) and NomAvailCap (NAC) which assume nominal temperature and a very light load. If at rest, FCC and RM will usually be calculated by the gauge by running a simulation at the current temperature assuming a load equivalent to Avg I/P Last Run (in dataflash).
