Abstract: This disclosure provides systems, methods, and devices for improved circuitry that supports proactive device performance and battery management. In a first aspect, a method of power management for a device includes receiving a voltage value of a battery for a device; determining a first battery power available based on the voltage value for a first future load duration; determining a second battery power available based on the voltage value for a second future load duration that is different from the first future load duration, and adjusting at least one parameter of operation of the device powered from the battery based on the first battery power available and the second battery available. Other aspects and features are also claimed and described.