A method and an apparatus for performing power consumption management are provided, where the method is applied to an electronic device. The method includes: obtaining current information corresponding to an application from a database, the current information being of at least one current on at least one current path between a battery and at least one portion of the electronic device; and performing battery drain prediction corresponding to the application according to the current information. The method may further include: performing sampling operations to generate a plurality of samples of the current, and more particularly, utilizing an ADC to perform analog-to-digital conversion on a voltage difference corresponding to the current to generate the plurality of samples. The voltage difference can be obtained by probing two terminals of a resistor or a Hall component.