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  2. Wireless Power Consortium - Wikipedia

    en.wikipedia.org/wiki/Wireless_Power_Consortium

    However, even using the current EPP standard, it typically takes 2.5–5 hours to charge a typical smartphone, with a typical 10 Watt-hour battery, which would imply that if the charge rate was 10 Watts, it would take only one hour. Therefore 2.5 hours charge time means the average charging rate was only 10/2.5 = 4 watts.

  3. Casio 9850 series - Wikipedia

    en.wikipedia.org/wiki/Casio_9850_series

    Battery life for the primary power cells ranges from 300 hours (LR03 battery) to 200 hours (R03 battery) for continuous display of main menu. Backup cells last up to about 2 years each. The calculators weigh about 190 grams including batteries , and measure about 19.7 mm x 83 mm x 176 mm. Features include scientific calculations , including ...

  4. Energy density Extended Reference Table - Wikipedia

    en.wikipedia.org/wiki/Energy_density_Extended...

    battery, Lithium–Manganese [19] [20] 0.83-1.01: 1.98-2.09: battery, Sodium–Sulfur: 0.72 [21] 1.23 [citation needed] 85% [22] battery, Lithium-ion [23] [24] 0.46-0.72: 0.83-3.6 [25] 95% [26] battery, Sodium–Nickel Chloride, High Temperature: 0.56: battery, Zinc–manganese (alkaline), long life design [19] [23] 0.4-0.59: 1.15-1.43: battery ...

  5. Watt-hour per kilogram - Wikipedia

    en.wikipedia.org/wiki/Watt-hour_per_kilogram

    The watt, kilogram, joule, and the second are part of the International System of Units (SI). The hour is not, though it is accepted for use with the SI.Since a watt equals one joule per second and because one hour equals 3600 seconds, one watt-hour per kilogram can be expressed in SI units as 3600 joules per kilogram.

  6. Gravity battery - Wikipedia

    en.wikipedia.org/wiki/Gravity_battery

    Pendulum clock driven by three weights as "gravity battery". An old and simple application is the pendulum clock driven by a weight, which at 1 kg and 1 m travel can store nearly 10 Newton-meter [Nm], Joule [J] or Watt-second [Ws], thus 1/3600 of a Watt-hour [Wh], while a typical Lithium-ion battery 18650 cell [2] can hold about 7 Wh, thus 2500 times more at 1/20 of the weight.

  7. The Best Solar-Powered Generators for Both Off-Grid ...

    www.aol.com/best-solar-powered-generators-both...

    The 2,048 watt-hours battery capacity and 2,400-watt power output can handle everything from a refrigerator to keeping travel trailer lights on. ... plenty of people in the van-life and remote ...

  8. Peukert's law - Wikipedia

    en.wikipedia.org/wiki/Peukert's_law

    is the actual time to discharge the battery (in hours). Using the above example, if a battery rated for 100 ampere-hours at a 20-hour rate has a Peukert constant of 1.2 and is discharged at a rate of 10 amperes, it would be fully discharged in time (), which is approximately 8.7 hours. It would therefore deliver only 87 ampere-hours rather than ...

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