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2. List of energy abbreviations - Wikipedia

   en.wikipedia.org/wiki/List_of_energy_abbreviations

   HDD—Heating degree days a qualitative index used to reflect the demand for energy to heat a business (conservation) HERS—Home energy rating standard (conservation) HHI—Herfindahl–Hirschman Index (markets) HID—high intensity discharge (electricity) hp—Horsepower (measurement) HRSG—Heat recovery steam generation

3. List of battery sizes - Wikipedia

   en.wikipedia.org/wiki/List_of_battery_sizes

   A Battery: Eveready 742: 1.5 V: Metal tabs H: 101.6 L: 63.5 W: 63.5 Used to provide power to the filament of a vacuum tube. B Battery: Eveready 762-S: 45 V: Threa­ded posts H: 146 L: 104.8 W: 63.5 Used to supply plate voltage in vintage vacuum tube equipment. Origin of the term B+ for plate voltage power supplies.

4. Cost of electricity by source - Wikipedia

   en.wikipedia.org/wiki/Cost_of_electricity_by_source

   The levelized cost of electricity (LCOE) is a metric that attempts to compare the costs of different methods of electricity generation consistently. Though LCOE is often presented as the minimum constant price at which electricity must be sold to break even over the lifetime of the project, such a cost analysis requires assumptions about the value of various non-financial costs (environmental ...

5. Battery nomenclature - Wikipedia

   en.wikipedia.org/wiki/Battery_nomenclature

   A zinc-carbon lantern battery, consisting of 4 round "size 25" cells in series. Terminated with spring terminals. 4LR25-2: 4: L: R: 25: 2: An alkaline lantern battery, consisting of 2 parallel strings of 4 round "size 25" cells in series 6F22: 6: F: 22: A zinc-carbon rectangular battery, consisting of 6 flat "size 22" cells. Equivalent to a PP3 ...

6. HP-27 - Wikipedia

   en.wikipedia.org/wiki/HP-27

   A HP 27. The HP-27 was a hand-held scientific and financial, but not programmable, calculator made by Hewlett-Packard between 1976 and 1978. Unlike all previous HP's pocket calculators, the HP-27 could do mathematic, statistic and business operations. It used Reverse Polish Notation (RPN) for calculations, working on a four-level stack (x,y,z,t ...

7. Electricity sector of the United States - Wikipedia

   en.wikipedia.org/wiki/Electricity_sector_of_the...

   An important factor that influences tariff levels is the mix of energy sources used in power generation. For example, access to cheap federal power from hydropower plants contributes to low electricity tariffs in some states. Average residential electricity consumption in the U.S. was 936 kWh/month per in 2007, and the average bill was US$100/month

8. Ford recalls over 270,000 US vehicles due to battery concern

   www.aol.com/ford-recalls-over-270-000-124129102.html

   Ford Motor is recalling 272,817 vehicles in the United States due to concerns over battery failure, the National Highway Traffic Safety Administration (NHTSA) said on Thursday. The recall affects ...

9. HP-27S - Wikipedia

   en.wikipedia.org/wiki/HP-27S

   The HP-27S was a pocket calculator produced by Hewlett-Packard, introduced in 1988, and discontinued between 1990 and 1993 (sources vary). It was the first HP scientific calculator to use algebraic entry instead of RPN , and though it was labelled scientific , it also included features associated with specialized business calculators.