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.
Near Field Communication. Near Field Communication (NFC) is a set of short-range wireless technologies, typically requiring a distance of 4cm or less to initiate a connection. NFC allows you to share small payloads of data between an NFC tag and an Android-powered device, or between two Android-powered devices. Tags can range in complexity. Simple tags offer just read and write semantics, sometimes with one-time-programmable areas to make the card read-only. More complex tags offer math operations, and have cryptographic hardware to authenticate access to a sector.