A battery eliminator is a device that provides an alternate source of power to a piece of equipment normally powered by batteries. Such devices can replace batteries for radios and other portable appliances. Electronics stores often carry them, along with accessories. It may also be possible to build one for a specific application, for people who are comfortable working with circuits and electrical components. Guides for custom-built devices are often available online, particularly through hobbyist and enthusiast pages for various types of battery-powered equipment.
Connecting with a source of power like a wall outlet or a solar panel, a battery eliminator processes the power, and provides a connection for the battery-powered device. It is important to use an appropriate eliminator, as the voltages such devices are designed to use can be quite variable. Simply plugging battery-powered appliances directly into an outlet can be dangerous, as can using the wrong battery eliminator to convert voltage to a usable form.
One drawback of a battery eliminator is that it typically reduces portability. A device may be tethered to the wall with a converter box, or could become less portable because of an attached solar panel that cannot easily be moved. Such devices, however, may be useful for saving on expenses associated with batteries, or for powering equipment that uses a rare or outdated battery type that cannot easily be purchased on the open market.
The battery eliminator operates through the use of power conversion, and can step voltages up or down in addition to converting alternating current to direct current. The device should include specifications that provide information about its capacity and the type of power it can handle. It also shows the types of conversions it does; a nine volt battery eliminator, for example, may just replace nine volt batteries, while others may have adjustable settings for different voltages.
People may build battery eliminator equipment for various applications. This requires the use of a kit or some specialized components to successfully convert power for use with various electronic devices. It is important to be attentive during construction of battery eliminators and other components, to avoid errors that could cause serious problems. They need to be properly insulated, with all leads appropriately connected and controlled. It is also important to periodically inspect the wiring on any electronic device to check for signs of fraying, shorts, and other issues that might damage equipment or create health risks.