Various embodiments of methods and systems for managing battery capacity in a portable computing device (“PCD”) are disclosed. One such method includes leveraging a request/grant algorithm that receives a request from an offline component to come online. If battery capacity is available to accommodate the offline component, the request is granted. If battery capacity is not available to accommodate the offline component, the request is authorized at a reduced power level or capacity is created by reducing power to online components. Another method polls a battery to monitor demand on its capacity by active components. Offline components likely to come online concurrently with the active components are identified and ranked based on power consumption. A target current margin is adjusted based on the highest power consumption associated with an identified block of offline components.