What is Voltage?
| Battery Voltages |
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The voltage of batteries is quoted as 'nominal' because it varies during the life of the battery and the amount of current being taken from the battery. If the voltages of a new battery is measured (across a large resistance) it may be a little higher. This will soon drop to the nominal voltage and later in life the voltage will drop further - the torch becomes less bright as the battery gets used up. The volts of Alkaline batteries droops in a curve during its life. Lead-Acid, Zinc-Air, Silver-Oxide and NiCd batteries have a much more constant voltage - a 'flat' discharge / time curve. |
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