The maximum capacity of the battery is the percentage parameter of the current loss of the battery, that is, the battery capacity relative to the new battery. If the battery health value is 100%, it means that the battery capacity of 100% can be used at present. Take iPhone 13 pro pro as an example, all batteries of 100% or 3095mAh can be used, and only the battery capacity of the currently displayed percentage can be used after restoration.