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  2. Black powder substitute - Wikipedia

    en.wikipedia.org/wiki/Black_powder_substitute

    Black powder substitutes are measured by volumetric measurement techniques, not in grains on a scale, due to the difference in density compared to black powder. For example, to measure a "60 grain equivalent" of black powder substitute suitable for use in a muzzleloader rifle, one uses a volumetric measure that produces a volume of black powder ...

  3. Comparison of commercial battery types - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_commercial...

    Lead–acid: SLA VRLA PbAc Lead: H 2 SO 4: Lead dioxide: Yes 1881 [1] 1.75 [2] 2.1 [2] 2.23–2.32 [2] 0.11–0.14 (30–40) [2] 0.22–0.27 (60–75) [2] 180 [2] 5.27–13.55 (74–190) [2] 50–92 [2] 3–20 [2] Zinc–carbon: Carbon–zinc Zinc: NH 4 Cl Manganese (IV) oxide: No 1898 [3] 0.75–0.9 [3] 1.5 [3] 0.13 (36) [3] 0.33 (92) [3] 10 ...

  4. Lead–acid battery - Wikipedia

    en.wikipedia.org/wiki/Lead–acid_battery

    IUoU battery charging is a three-stage charging procedure for lead-acid batteries. A lead-acid battery's nominal voltage is 2.2 V for each cell. For a single cell, the voltage can range from 1.8 V loaded at full discharge, to 2.10 V in an open circuit at full charge.

  5. Galvanic cell - Wikipedia

    en.wikipedia.org/wiki/Galvanic_cell

    In the strictest sense, a battery is a set of two or more galvanic cells that are connected in series to form a single source of voltage. For instance, a typical 12 V lead–acid battery has six galvanic cells connected in series, with the anodes composed of lead and cathodes composed of lead dioxide, both immersed in sulfuric acid.

  6. Major seventh chord - Wikipedia

    en.wikipedia.org/wiki/Major_seventh_chord

    The major seventh chord, sometimes also called a Delta chord, can be written as maj 7, M 7, Δ, ⑦, etc. The "7" does not have to be superscripted, but if it is, then any alterations, added tones, or omissions are usually also superscripted. For example, the major seventh chord built on C, commonly written as Cmaj 7, has pitches C–E–G–B:

  7. Lithium metal battery - Wikipedia

    en.wikipedia.org/wiki/Lithium_metal_battery

    The common CR2032 battery is 20 mm diameter and 3.2 mm thick, where the first two digits is the diameter and the last two digits are thickness. A CR2025 is the same 20 mm diameter but 2.5 mm thick. The heavy electrical demands of many of these devices make lithium batteries a particularly attractive option.

  8. Silver–calcium battery - Wikipedia

    en.wikipedia.org/wiki/Silver–calcium_battery

    Silver–calcium alloy batteries are a type of lead–acid battery with grids made from lead–calcium–silver alloy, instead of the traditional lead–antimony alloy or newer lead–calcium alloy. They stand out for its resistance to corrosion and the destructive effects of high temperatures.

  9. Nickel–hydrogen battery - Wikipedia

    en.wikipedia.org/wiki/Nickel–hydrogen_battery

    A nickel–hydrogen battery (NiH 2 or Ni–H 2) is a rechargeable electrochemical power source based on nickel and hydrogen. [5] It differs from a nickel–metal hydride (NiMH) battery by the use of hydrogen in gaseous form, stored in a pressurized cell at up to 1200 psi (82.7 bar ) pressure. [ 6 ]