BATTERY

An electric battery is a device consisting of one or more electrochemical cells that convert stored chemical energy into electrical energy. Each battery consists of a negative electrode (anode) that holds charged ions, a positive electrode (cathode) that holds discharged ions, an electrolyte that allows ions to move from anode to cathode during discharge (and return during recharge) and terminals that allow current to flow out of the battery to perform work.

Batteries are either primary (single-use or "disposable") that are used once and discarded or secondary (rechargeable batteries) that are discharged and recharged multiple times.

Batteries are made from many materials including various metals, carbon, polymers and even air. The most common are lead-acid batteries used in vehicles and lithium ion batteries used for portable electronics. Batteries come in many shapes and sizes, from miniature cells used to power hearing aids and wristwatches to battery banks the size of rooms that provide standby power for telephone exchanges and computer data centers.

Batteries have recently received significant research and development, because they are hoped to provide a solution for energy storage in a transition from fossil fuels to alternative energy, both for transport and electricity production and for powering portable devices of all kinds.

Billions of batteries are used each year to power devices as diverse as automobiles to mobile phones.According to a 2005 estimate, the worldwide battery industry generates US$48billion in sales each year, with 6% annual growth.

DURACELL

Duracell manufactures alkaline batteries in many common sizes, such as AAA, AA, C, D, and 9V, but capacity of Duracell batteries can't be found on the official Duracell site (www.duracell.com). Lesser used sizes such as AAAA (primarily for pagers, penlights, and blood glucose meters) and J size batteries (for hospital devices and photographic strobe flash units) are also manufactured along with a range of "button" batteries using zinc-air, silver-oxide and lithium chemistries, used in calculators, watches, hearing aids, and other small (mostly medical related) devices. Duracell entered into a brand licensing agreement with flash memory manufacturer Dane-Elec in 2008 for a line of products including memory cards, hard drives and USB flash drives with the Duracell brand mark and in the brand's trademark "copper top" coloring

Duracell also manufactures specialty batteries, including NiMH rechargeable batteries and batteries for cameras, watches, hearing aids, etc. Their two main battery brands are "CopperTop (Plus)," marketed as longer-lasting, and "Ultra," directed mainly at users of digital devices and devices that need more power. Duracell also has a line of lithium chemistry batteries and products, now manufactured outside of the U.S.

In 2013 the company released a new "Duracell Quantum" line as their top performing product series.In recent years, Duracell's innovations expanded to include new battery designs with their prismatic batteries, which are prismatic in shape rather than cylindrical. Prismatic cells were made available in both alkaline and lithium designs. In 2006, Duracell introduced "Power PixTM" batteries with NiOx technology, designed to supply longer life in digital cameras and other high drain devices by up to twice the number of photos typically achievable with alkaline batteries.

ENERGIZEREnergizer Holdings is an American manufacturer of batteries and personal care products, headquartered in Town and Country, Missouri. Its most well known brands are Energizer and Eveready batteries, Schick, Wilkinson Sword and Edge shaving products, Playtex feminine hygiene and baby products, and Hawaiian Tropic and Banana Boat sunscreen products. The company sells in over 165 countries.The company has its foundation in the Eveready Battery Company, which in 1980 renamed its Eveready Alkaline Power Cell to Energizer. In 1986, Eveready Battery Company was sold to animal and human food manufacturer Ralston Purina. In 2000, Ralston spun off Eveready, and it was listed on the New York Stock Exchange as Energizer Holdings, Inc.