In electronics, a battery or voltaic cell is a combination of one or more electrochemical Galvanic cells which store chemical energy that can be converted into electric potential energy, creating electricity. Since the invention of the first Voltaic pile in 1800 by Alessandro Volta, the battery has become a common power source for many household and industrial applications, and is now a multi-billion dollar industry.

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Unlike a corded telephone, a cordless telephone needs mains electricity to power the base station. The cordless handset is powered by a rechargeable battery, which is charged when the handset sits in its cradle.

iPod is a brand of portable media players designed and marketed by Apple and launched on October 23, 2001 (2001-10-23).

The charge current depends upon the technology and capacity of the battery being charged. For example, the current that should be applied to recharge a 12 V car battery will be very different from the current for a mobile phone battery.

Rechargeable batteries use electrochemical reactions that are electrically reversible.

Rechargeable batteries use electrochemical reactions that are electrically reversible.

Duracell manufactures alkaline batteries in many common sizes, such as AAA, AA, C, D, and 9V. Lesser used sizes such as AAAA (primarily for pagers, penlights, and blood glucose meters) and J size batteries (for hospital devices) are also manufactured along with a range of "button" batteries using Zinc-air chemistry, used in calculators, hearing aids, and other small (mostly medical related) devices. Duracell began selling Dane-Elec products such as flash memory in 2008

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