37V

37V refers to a potential difference of 37 volts in direct current (DC) systems. As a nominal value, it is most commonly encountered in battery packs and some power supplies, where 37V indicates the typical operating level rather than an exact instantaneous reading.

In practice, a 37V nominal pack is usually a 10-series (10S) Li-ion or Li-polymer configuration, since each cell has a nominal voltage of about 3.7V. The full-charge voltage for such a pack is typically around 41–42V (4.2V per cell), while a discharged pack may be near 30V, depending on cell chemistry and protection circuitry.

In consumer products, 36V–37V packs are common in electric bicycles, power tools, and other devices that require a mid-range DC supply. In contrast, standard capacitor ratings in this range are often 35V or 50V; 37V is less commonly used as a standalone capacitor rating.

Safety considerations: working with 37V DC requires appropriate insulation and precautions to prevent shock, short circuits, and arc faults. While many safety standards treat 37V as below the threshold for dangerous voltage in some jurisdictions, current can still be hazardous if a conductive path exists, and proper handling and protective circuitry are advised.