Instead of using mechanical tumblers, an electric lock will components like motors, magnets, and solenoids. Some electronic locks also use keypads while others may have optical or magnetic card readers. The most secure electronic lock will use both of these things. As a backup, sometimes they will include mechanical tumblers. This is done so a regular key can be used in order to bypass the other methods of security. From time to time, they will need to be serviced because batteries power many. They are generally installed on doors but they can also be used on safes and other similar applications.
from Home Improvement:Security Articles from EzineArticles.com http://EzineArticles.com/9675072
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