"For a rechargeable battery (or a capacitor, especially for an electrochemical capacitor) the fraction, usually expressed as a percentage, of the total electrical energy stored in a battery by charging that is still available for discharging at a certain point of time. Contrast with depth of discharge. "
STATE OF CHARGE
Meaning of STATE OF CHARGE in English
Electrochemistry English dictionary. Английский словарь электрохимии. 2012