A rechargeable battery, storage battery, or accumulator is a type of electrical battery. It comprises one or more electrochemical cells, and is a type of energy accumulator. It is known as a secondary cell because its electrochemical reactions are electrically reversible. Rechargeable batteries come in many different shapes and sizes, ranging from button cells to megawatt systems connected to stabilize an electrical distribution network. Several different combinations of chemicals are commonly used, including: lead–acid, nickel cadmium (NiCd), nickel metal hydride (NiMH), lithium ion (Li-ion), and lithium ion polymer (Li-ion polymer).
Rechargeable batteries have lower total cost of use and environmental impact than disposable batteries. Some rechargeable battery types are available in the same sizes as disposable types. Rechargeable batteries have higher initial cost but can be recharged very cheaply and used many times.
The most common form of nine-volt battery is commonly called the transistor battery, introduced for the early transistor radios. This is a rectangular prism shape with rounded edges and a polarized snap connector at the top. This type is commonly used in pocket radios, smoke detectors, carbon monoxide detectors, guitar effect units, electro-acoustic guitars and radio-controlled vehicle controllers. They are also used as backup power to keep the time in certain electronic clocks. This format is commonly available in primary carbon-zinc and alkaline chemistry, in primary lithium iron disulfide, and in rechargeable form in nickel-cadmium, nickel-metal hydride and lithium-ion. Mercury oxide batteries in this form have not been manufactured in many years due to their mercury content.
This type is designated NEDA 1604, IEC 6F22 and "Ever Ready" type PP3 (zinc-carbon) or MN1604 6LR61 (alkaline).
The Chevrolet Volt is a plug-in hybrid electric vehicle manufactured by General Motors, also sold as the Holden Volt in Australia and New Zealand. With a different styling it is sold as the Vauxhall Ampera in Great Britain and as the Opel Ampera in the rest of Europe. Sales of the 2011 Chevrolet Volt commenced in the U.S. in mid-December 2010 followed by various European countries and other international markets in 2011. As of 30 September 2013[update], the Volt and Ampera models have combined global sales of over 58,000 units, with the U.S. as the leading market with 48,218 Chevrolet Volts delivered since its introduction in 2010, making the Volt the top selling plug-in electric vehicle in the United States, and the Volt/Ampera family the best selling plug-in hybrid in the world. Netherlands is the world's second largest market and leads the European market with 3,688 Amperas and 1,056 Volts sold through September 2013.
As of September 2013[update], the Volt is the most fuel-efficient car with a gasoline engine sold in the United States, as rated by the United States Environmental Protection Agency (EPA), with a combined electric mode/gasoline-only rating of 62 mpg-US (3.8 L/100 km; 74 mpg-imp) equivalent (MPG-equivalent) for the 2013 model year. The Volt operates as a pure battery electric vehicle until its plug-in battery capacity drops to a predetermined threshold from full charge. From there its internal combustion engine powers an electric generator to extend the vehicle's range if needed. When the engine is running it may be periodically mechanically linked (by a clutch) to the traction motor, to improve energy efficiency. The Volt's regenerative braking also contributes to the on-board electricity generation.
In journalism, a human interest story is a feature story that discusses a person or people in an emotional way. It presents people and their problems, concerns, or achievements in a way that brings about interest, sympathy or motivation in the reader or viewer.
Human interest stories may be "the story behind the story" about an event, organization, or otherwise faceless historical happening, such as about the life of an individual soldier during wartime, an interview with a survivor of a natural disaster, a random act of kindness or profile of someone known for a career achievement.