Capacity
Capacity is usually expressed in ampere-hours or milliampere-hours.
In any given continuous drain application, the average current flowing
multiplied by the hours of service equals the rated capacity of
the cell. Alkaline cells and batteries are available in button (45
mAh to 110 mAh) and in cylindrical (580 mAh to 15,000 mAh) configurations.
The following figures illustrate the typical discharge characteristics
of the major cell types when discharged at a constant current at 70°F
(21°C) to a voltage cutoff of 0.8 volts (Figure 1) and
the typical discharge characteristics when discharged at constant
resistance at 70°F (21 °C) to a 0.8 volt cutoff (Figure
2). Figure 1

Typical discharge characteristics with constant current of DURACELL
alkaline cells.
Figure 2

Typical discharge characteristics with constant resistance of
DURACELL alkaline cells.