HowStuffWorks "How Batteries Work"

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** How Batteries Work **

by Marshall Brain, Charles W. Bryant and Clint Pumphrey

· Page
· 1

Introduction to How Batteries Work

· 2

Battery History

· 3

Anatomy of a Battery

· 4

Battery Reactions and Chemistry

·
Battery Image Gallery
Battery Image Gallery

How do batteries power our world? See more battery pictures.

iStockphoto/Thinkstock

*Learn More*

· Test Your Knowledge: Battery Quiz
· How Lithium-ion Batteries Work
· When was the first battery invented?

Imagine a world where everything that used electricity had to be plugged
in. Flashlights, hearing aids, cell phones and other portable devices would
be tethered to electrical outlets, rendering them awkward and cumbersome.
Cars couldn't be started with the simple turn of a key; a strenuous
cranking would be required to get the pistons moving. Wires would be strung
everywhere, creating a safety hazard and an unsightly mess. Thankfully,
batteries provide us with a mobile source of power that makes many modern
conveniences possible.

While there are many different types of batteries, the basic concept by
which they function remains the same. When a device is connected to a
battery, a reaction occurs that produces electrical energy. This is known
as an *electrochemical reaction*. Italian physicist Count Alessandro Volta
first discovered


Source: electronics.howstuffworks.com/everyday-tech/battery.htm


how do aa batteries work


Battery (electricity) - Wikipedia, the free encyclopedia

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** Battery (electricity) **

From Wikipedia, the free encyclopedia
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For other uses, see Battery (disambiguation).


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Various cells and batteries (top-left to bottom-right): two AA, one D, one
handheld ham radio battery, two 9-volt (PP3), two AAA, one C, one camcorder
battery, one cordless phone battery.

In electricity, a *battery* is a device consisting of one or more
electrochemical cells that convert stored chemical energy into electrical
energy.^[1] Since the invention of the first battery (or "voltaic pile") in
1800 by Alessandro Volta and especially since the technically improved
Daniell cell in 1836, batteries have become a common power source for many
household and industrial applications. According to a 2005 estimate, the
worldwide battery industry generates US$48 billion in sales each year,^[2]
with 6% annual growth.^[3]

There are two types of batteries: primary batteries (disposable batteries),
which are designed to be used once and discarded, and secondary batteries
(rechargeable batteries), which are designed to be recharged and used
multiple times. Batteries come in many sizes, from miniature cells used to
power hearing aids and wristwatches to battery banks the size of rooms that
provide standby power


Source: en.wikipedia.org/wiki/Battery_(electricity)

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