A typical nickel-cadmium (NiCd) battery usually has a nominal voltage rating of 1.2 volts per cell. This means that a single cell within a NiCd battery provides about 1.2 volts of electrical potential difference. NiCd batteries are often constructed by connecting multiple cells in series to achieve higher voltages. For example, a common NiCd battery might consist of 6 cells in series, resulting in a nominal voltage of around 7.2 volts (6 cells × 1.2 volts/cell).
It's important to note that the actual voltage of a NiCd battery can vary depending on factors such as the state of charge, load conditions, and temperature. The 1.2-volt nominal voltage is a common standard for NiCd batteries, but the actual voltage can be slightly higher when fully charged and slightly lower when discharged.