Not to be confused with data backup, a computer battery backup helps protect your valuable data in the event of a power loss or blackout.
Most computer battery backups are used in business and corporate environments, where large servers and computer networks are used. However, smaller computer battery backup are gaining popularity among home office computer users who can't afford to lose valuable data to a power loss.
Most computer battery backups serve two main functions: they regulate power, similar to a surge protector, and they provide backup power to a computer in the event of a power failure.
If a blackout or power loss does occur, the battery backup will provide a certain amount of extra time it will keep the computer's power on, depending on the model. This extra time is crucial to backup and save data, then properly (and safely) shut down the system until power is restored.
Many computer battery backups provide a strip of multiple outlets, similar to a surge protector. This allows a number of peripheral computer devices (such as the monitor) to be plugged into the battery backup. After all, a computer would be difficult to use without a powered monitor.
Computer battery backups are considered fairly inexpensive for the service and peace-of-mind they provide. Most consumer-level battery backups cost anywhere from $70 to $300, depending on the power it will provide. Some companies even offer a "Connected Equipment Warranty" or similar program that insures your hardware from damage up to a certain amount, sometimes as high as $50,000 for corporate environments.
There are many different brands of computer battery backups. A few examples of reputable companies would be APC, Dynex, and CyberPower. You can read battery backup reviews on the Internet to see what others are saying about a specific model.
Lastly, a battery backup can refer to another type of device, which is a bit different from the above-mentioned kind. Laptop battery backups are similar to spare laptop batteries, although they usually provide much more power and are sometimes universally compatible with many laptop brands. These battery backups are meant to be carried with the laptop and, in the event of a drained battery, used as a power backup until the regular battery can be recharged.
Some companies even sell battery backups for entertainment devices like an iPod or other MP3 player, portable movie players, and portable DVD players.
More information on battery backups