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What is Volt?
Volt (V), short for voltage, is a measure of electrical force or electrical pressure. The terminal voltage, measured in volts, of a battery is the electrical potential difference across its terminals. Battery cells of different chemistries have different voltages. A nickel-based cell, like NiCd and NiMH, provides a nominal cell voltage of approximately 1.2 V and a Li-ion cell provides 3.6V.
The voltage of two cells of the same chemistry is always the same. Their capacities may be different, but the voltage always remains the same. A higher terminal voltage can be obtained only by assembling more than one cell in a series, parallel or a mixture of both. For example, a 12 V, NiCd battery would be made up of 10 cells connected in a series.
The voltage of two cells of the same chemistry is always the same. Their capacities may be different, but the voltage always remains the same. A higher terminal voltage can be obtained only by assembling more than one cell in a series, parallel or a mixture of both. For example, a 12 V, NiCd battery would be made up of 10 cells connected in a series.
10 cells x 1.2 V NiCd cell = 12 V battery
The voltage of a cell or a battery pack must always match the voltage requirement of the device in which it is used. If there is any mismatch of the two voltages the device will not function. Excessive exposure to a different voltage could also damage the equipment. So, equipment users should take special care that the batteries they are using matches the voltage requirement of their device.
