How are unit batteries typically measured?

Unit batteries are typically measured in amp hours, which indicate the total amount of energy a battery can store and deliver over time. This measurement reflects how much current a battery can provide continuously for a certain number of hours before it runs out of energy. It is particularly useful in applications where understanding the duration of power supply is crucial, such as in portable electronics or electric vehicles.

While volts measure the potential difference and provide insight into how much energy is available at any moment, and ohms indicate resistance which affects the current flow in a circuit, they do not represent the storage capacity of a battery. Watts, on the other hand, are a measure of power, which is the rate of energy transfer, but again, do not directly indicate how long a battery can sustain its output. Amp hours directly captures the energy storage characteristic of a battery, making it the most relevant measure among the choices provided.