by including automatic sensing circuitry that shuts down memory, processors, and peripherals when a handset is not transmitting. For example, if the user is not in a Wi-Fi zone, the Wi-Fi circuitry is disabled SO that it does not draw power when it can't even be used. Most smartphones and tablet computers include this form of power management. www.TechnicalPDF.com Other manufacturers are developing new screen technologies that consume less power. More Convenient Way to Charge Batteries Electronics companies have developed more convenient ways to charge smartphones. There are wireless charging devices on the market able to charge phones placed on top of them. So, instead of tossing a phone in a kitchen drawer or on a dresser in the evening before going to bed, users are able to simply place it on a small charging device and have a fully charged tablet or smartphone waiting for them in the morning. The charging device itself must be plugged into an electrical outlet. Charging mobile devices gradually wears down the battery and shortens its life. Over time, batteries hold charges for shorter amounts of time. This is because every charge deposits chemicals on the device's contacts. These chemicals corrode the contacts creating resistance to the charge. A lithium-ion (Li-ion) battery experiences corrosion in a different manner, but it, too, becomes resistant to charges. Thus, less voltage reaches the circuitry that carries the current to the battery. Voltage refers to the "pressure" of the electricity flowing through the handset's circuits. Low "pressure" or voltage means that less electricity is reaching the battery. People that need more battery power than that built into the phone purchase battery packs that clip onto their mobile devices or mobile phone cases already equipped with battery packs. APPLICATIONS AND SERVICES Applications on mobile devices attract customers, generate revenue, and are a tool for retaining customers. Mobile Payments Mobile handsets can be utilized for mobile banking, financial transactio