each high-altitude locations. In the future it is likely that cameras within drones will transmit information to public safety officials. Thus, drones will track criminals SO that helicopters won't be needed. Often helicopters crash during pursuits of criminals, killing or severely injuring pilots or even people on the ground. One of the security precautions being developed will track drones in restricted airspace such as military bases and commercial airports where saboteurs might launch drones to compromise safety in these areas. www.TechnicalPDF.com Battery Life Inadequate battery life is a major issue with smartphone and tablet computer owners, self-driving car and truck developers, and myriad other services that depend on battery life. Battery technology has not kept up with users' dependence on mobile services and development of new, automated technologies. People are more dependent on portable devices for their voice and text communications as well as social networking, music, and increasingly, for video. They also use these devices on Wi-Fi networks and for video conferences. Data applications require more power from the device. Bandwidth-heavy applications such as Internet access, video, and e-mail drain batteries more quickly than voice calls. This is because voice requires fewer bits than data when transmitted. In addition, large color displays drain batteries more quickly than the less- sophisticated screens on earlier devices. Thus, as people become increasingly dependent on mobile devices for more functions, it is important to find ways to extend battery life. A current focus is on ways to design mobile handsets that use power more efficiently. One such technology extinguishes screen backlighting when it is not required. The technology senses ambient lighting to determine when backlighting is needed. It maintains color by creating brighter color pixels SO that mobile devices don't draw current from backlights in daylight. Another way that manufacturers design handsets to improve power management is 