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Batteries contain chemicals, and these chemicals generate reactions that result in electrical energy. Batteries are a portable source of electrical power. They are often used as an energy source for assistive devices and medical equipment. For people with disabilities, batteries also facilitate participation in social and professional activities. Batteries are used, for example, in power- dependent devices such as wheelchairs, hearing aids and talking clocks. Batteries power Voice Output Communication Aids (VOCAs) that help children with autism to develop receptive and expressive language.
Batteries can be critically important to people with disabilities who use medical and assistive equipment such as stair chairs, scooters, Braille clocks,and personal emergency response systems. Life support systems can be powered by batteries. Batteries also power many other devices that are used in daily life for practical purposes and for enjoyment. These devices range from a computer's wireless mouse to a lawn mower, and include clocks, fans, lights,cameras, phones and the remote controls that operate television and musical equipment.Batteries are not only an alternative source of power for objects that already exist, the battery has been an impetus for the development of new technology. For decades, batteries started cars that were powered by gasoline. Recently, cars have been designed that do not require gasoline and are powered entirely by battery packs.
Batteries, even when re-charged and re-used, are a more expensive source of power than electricity. However, in emergencies that include electrical power outage, batteries can preserve the life of a person with a health-related disability by powering essential medical and assistive equipment and by enabling communication. When standard TVs and radios no longer function,for example, a small, battery powered TV can provide information and instructions through closed captions or American Sign Language.
The life of a battery is short, so effective alternatives need to be considered in the event of local or widespread power failure.The customer service department of utility companies can provide information about the locations of alternative sources of power, and should be promptly contacted when moving into a new home.
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