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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.
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, Silver-oxide [19] 0.47: 1.8: Flywheel: 0.36-0.5 [27] [28] 5.56 × 45 mm NATO bullet muzzle energy density [clarification needed ...
oil-based units: gigatonne of oil equivalent: Gtoe Gtoe 1.0 Gtoe (42 EJ) megatonne of oil equivalent: Mtoe Mtoe 1.0 Mtoe (42 PJ) kilotonne of oil equivalent: ktoe ktoe 1.0 ktoe (42 TJ) tonne of oil equivalent: toe toe 1.0 toe (42 GJ) kilo barrel of oil equivalent: kBOE (kbboe) kBOE 1.0 kBOE (6.1 TJ) barrel of oil equivalent: BOE BOE 1.0 BOE (6. ...
(Wh/kg) MJ/L (Wh/L) W/kg Wh/$ ($/kWh) % %/month years 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] 5.44–13.99 (72–184) [2] 50–92 [2] 3–20 [2] Zinc–carbon: Carbon–zinc Zinc: NH 4 Cl Manganese (IV) oxide: No 1898 [3] 0 ...
Energy conversion efficiency (η) is the ratio between the useful output of an energy conversion machine and the input, in energy terms. The input, as well as the useful output may be chemical, electric power, mechanical work, light (radiation), or heat. The resulting value, η (eta), ranges between 0 and 1. [1] [2] [3]
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They are typically lithium-ion batteries that are designed for high power-to-weight ratio and energy ... (same as Wh/kg) ... 1500 - 5000 [24] 3000 - 7000 [25] 4000