how much energy do mobile devices consume in USProvide me some literatures on this

According to a report by the Natural Resources Defense Council (NRDC), mobile devices in the US consume approximately 70 billion kilowatt-hours (kWh) of electricity each year, which is equivalent to the energy used by 6.4 million typical US homes. This energy consumption is expected to increase due to the growing number of mobile devices and the increasing demand for data-intensive applications.

Another report by the International Energy Agency (IEA) estimates that the global electricity consumption of information and communication technologies (ICT) including mobile devices, could increase from 1% of the total electricity demand in 2015 to 3.5% by 2025.

Some other relevant literature on this topic include:

• "Mobile Device Energy Consumption: Trends and Opportunities for Energy Savings" by the NRDC, which provides an overview of the energy consumption of mobile devices and identifies potential opportunities for energy savings.
• "Energy Consumption in Mobile Devices: A Measurement Study and Implications for Network Applications" by researchers at the University of California, Berkeley, which investigates the energy consumption of mobile devices and its implications for network applications.
• "Energy Consumption in Mobile Devices: How Networked Resources Can Help" by researchers at the University of Michigan, which proposes a framework for reducing energy consumption in mobile devices through the use of networked resources.