The Signs of a Bad CMOS Battery. 1  How to Remove a Desktop Battery From the Acer Aspire. 2  How to Replace the CMOS Battery in a Dell Latitude 600. 3  How to Replace a CMOS Battery. 4  How to Clear CMOS on HP Laptops. 5  How to Make a Computer Turn on From the Motherboard.
A summary of near-field communication. Near-field communication (NFC) is a set of communication protocols that enable two electronic devices, one of which is usually a portable device such as a smartphone, to establish communication by bringing them within 4 cm (1.6 in) of each other.
Device-to-device NFC can also be used to pair your phone with a wireless speaker or printer. And because NFC and Bluetooth are interoperable, you can use NFC to quickly pair your phone to a compatible Bluetooth device. The biggest potential for NFC lies in card emulation. Using whatâs called a secure element that randomly cycles security pins, you could use your NFC-equipped iPhone 6 to pay for your groceries by tapping the handset on a special pad at the checkout counter.