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2. Voltage converter - Wikipedia

   en.wikipedia.org/wiki/Voltage_converter

   In such cases, voltage converters need only be specified to convert any voltage within one range, to a voltage within the other, rather than separate converters being needed for all possible pairs of nominal voltages (110–220, 117–220, 110–230, etc.)

3. List of battery sizes - Wikipedia

   en.wikipedia.org/wiki/List_of_battery_sizes

   Still popular for school science class use as a variable voltage supply as the current version has several taps at 1.5 volt intervals. 791: Eveready 791 Eveready 791-A: 2R14: 3 V: D: 23.81 H: 98.43 Equivalent to two C batteries (BA-42) in series. Used in the M1 Bazooka. 15-volt: Fuji W10 Mallory M154 NEDA 220 Rayovac 220 10F15 (Zn/MnO 2) 220: ...

4. Trailer connectors in North America - Wikipedia

   en.wikipedia.org/wiki/Trailer_connectors_in...

   The plug for SAE J560 is physically identical to the connector ISO 1185. The difference is that J560 indicates that the voltage must be 12 V and that wire areas shall be larger due to the higher currents needed when using 12 V compared to 24 V. Some of the pins in the connector have also a slightly different function.

5. NEMA connector - Wikipedia

   en.wikipedia.org/wiki/NEMA_connector

   The NEMA TT-30 (TT stands for Travel Trailer) connector is a 120 V 30 A recreational vehicle standard (hot-neutral-ground), also known as RV 30. The TT-30R receptacle is commonly available in nearly all RV parks in the United States and Canada, and all but the largest RVs manufactured since the 1970s use this plug to connect to power feeds.

6. SAE J1772 - Wikipedia

   en.wikipedia.org/wiki/SAE_J1772

   Some EVs have extended J1772 to allow AC Level 1 (120 V) charging at greater than 16 amps. This is useful, for example, at RV parks where TT-30 ("Travel Trailer" - 120 V, 30 A) receptacles are common. These allow charging at up to 24 amps. However, this level of 120 V charging has not been codified into J1772.

7. Volt - Wikipedia

   en.wikipedia.org/wiki/Volt

   Historically the "conventional" volt, V 90, defined in 1987 by the 18th General Conference on Weights and Measures [3] and in use from 1990 to 2019, was implemented using the Josephson effect for exact frequency-to-voltage conversion, combined with the caesium frequency standard. Though the Josephson effect is still used to realize a volt, the ...

8. Power inverter - Wikipedia

   en.wikipedia.org/wiki/Power_inverter

   Utility frequency conversion - if a user in (say) a 50 Hz country needs a 60 Hz supply to power equipment that is frequency-specific, such as a small motor or some electronics, it is possible to convert the frequency by running an inverter with a 60 Hz output from a DC source such as a 12V power supply running from the 50 Hz mains.

9. A23 battery - Wikipedia

   en.wikipedia.org/wiki/A23_battery

   Left to right: AA, AAA, AAAA, N (E90) and A23 batteries An open A23 battery showing the LR932 cells with an intact battery. The A23 battery (also referred to as 23AE, GP23A, V23GA, [1] LRV08, [2] 8LR932, [3] 8LR23, MN21, L1028 or ANSI-1181A) is a dry battery consisting of eight LR932 cells, with a nominal voltage of 12 V.