DesignCap is the nominal battery capacity provided by battery vendor, or measured through characterization on a new battery. As the fuel-gauge learns over time, it can update the Full capacity measured dynamically as FullCapNom. The health measurement is determined by FullCapNom/DesignCap as a ratio. Usually when battery capacity decreases to 80% of new battery capacity, it is defined as end of life (around 500 cycles ~1000 cycles for Lithium ion battery)