Reviews, information and discussions about high tech gadgets.

The name "battery" was coined by Benjamin Franklin for an arrangement of multiple Leyden jars (an early type of capacitor) after a battery of cannon.[1] Common usage has evolved to include a single electrical cell in the definition.

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.

The advertised battery life on most models is different from the real-world achievable life. For example, the fifth generation 30 GB iPod is advertised as having up to 14 hours of music playback.

Digital cameras have high power requirements, and over time have become smaller, resulting in an ongoing need to develop a battery small enough to fit in the camera and yet able to power it for a reasonable length of time. Two broad types of batteries are in use for digital cameras.

It consists of a number of voltaic cells; each voltaic cell consists of two half cells connected in series by a conductive electrolyte containing anions and cations.

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.

The alkaline battery gets its name because it has an alkaline electrolyte of potassium hydroxide, as opposed to the acidic electrolyte of the zinc-carbon batteries which are offered in the same nominal voltages and physical size.

phone chargers are not really chargers, only adapters that provide a power source for the charging circuitry which is almost always contained within the mobile phone.

The cordless handset is powered by a rechargeable battery, which is charged when the handset sits in its cradle.

Some cordless phones advertised as 5.8 GHz actually transmit from ... utilize two rechargeable AA or AAA batteries

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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