New and innovative applications for mobile consumer-electronic devices, especially for Smartphones are developing rapidly, advances in battery technology have not kept pace with rapidly growing energy demands. Since, the batteries are limited in size and therefore capacity, power consumption is a critical concern for battery driven Smartphone and this implies that managing energy well is paramount in such device. The core need for good energy management requires a better understanding of where and how the energy is used: how much of the system's energy is consumed by which parts of the system and under what circumstances. This paper focuses on understanding the power consumption of major hardware components and their usage on different scenarios. We present a detail analysis of the power consumption of iPhone and develop a method PPAS-programmable power analysis method to analyze power consumption in different scenarios. This work identifies the most promising areas to focus on for further improvements of power management as well as implement some effective techniques to optimize power consumption.

Smartphone power consumption iPhone iOS