Information About 9v Batteries

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The 9v battery also referred to as a PP3 battery, appeared when portable transistorized radio receivers became common, and is still called a ‘transistor' battery by some manufacturers. PP3 actually refers to the type of connection or snap that is on top of the battery. It is shaped as a rounded rectangular prism and has a nominal output of nine volts. There are other nine volt batteries, such as PP7 and PP9. These date from the days of early transistor radios and are now less common than PP3. In the days of valve radios, there was a nine volt grid bias battery which had tapping for various voltages between 1.5 and 9.

The 9v batteries are commonly used in smoke detector which detects smoke and issues a signal to a fire alarm system, or issues a local audible and also visual alarm from the detector itself, also in guitar effect units, pocket radios, and in control systems. A control system is a device or set of devices to manage, command, direct or regulate the behavior of other devices or systems. There are two common classes of control systems, with many variations and combinations: logic gate, and feedback or ...
... linear controls. It is used in Radio control in which it is used for radio signals to remote control a device from a hand-held radio transmitter and it is also used in vehicle controllers.

They are also utilized as backup power to keep the time in digital clocks wherein time is displayed digitally as opposed to analog clock, where the time is displayed in hands and alarm clocks. An alarm clock is a clock that is designed to make a loud sound at a specific date and/or time. The primary use of these clocks is to awake people from their sleep in order to start their days in the mornings, but they are sometimes used for other reminders as well. These are the different uses of the 9V Batteries and the there are many more.

To read about batteries and other information, visit the battery charger site.