The deadbolt is battery-powered using four AA cells that last more than a year with normal operation.

ENGADGET

At least from what we've seen in the prototype, it really is just a keypad resting on top of the existing deadbolt.

ENGADGET: March 16, 2013 4:15 PM EDT

He recommends people get a solid or metal door for the front door and a solid-core door with a deadbolt for the master bedroom.

FORBES: Magazine Article

The Smart Knob promises a smarter, more secure deadbolt lock that lets us issue time-limited unlock codes or give trusted visitors a way in.

ENGADGET: March 16, 2013 4:15 PM EDT

The youngest, Ralph, is odd, locked in a sealed, symbiotic clutch with his girlfriend that is literalised when they install a deadbolt on their bedroom door.

ECONOMIST: Family memories: The death of a parent | The

Continental said it has worked closely with the Federal Aviation Administration and the plane manufacturers to develop its own restraint, which it said is similar to a deadbolt or crossbar.

CNN: Airlines move swiftly to secure cockpits

What Condoleezza Rice argued, however, was it made no sense to "put deadbolt locks on your doors and stock up on cans of mace and then decide to leave your windows open" to enemy attack.

CENTERFORSECURITYPOLICY: Anti-anti-missile defense

Master Lock sells a garage-door opener with a built-in fingerprint scanner, the Kwikset SmartScan Deadbolt will open up your front door with another finger swipe and Schlage's LiNK door locks allow owners to give anyone access to their home by punching a code into a computer keyboard or mobile phone's keypad.

FORBES: Magazine Article