The amount of current, which is taken in by a battery in a given time or given out during discharging is called the capacity. In the United States the term 'reserve capacity' is used. Here, during the discharge, a current of 25 A is stipulated to determine the capacity.
ExampleVar. set: I = 3,4 A; t = 5 h 15 min = 5,25 hVar. asked for: K in AhAnswer:K = I · t = 3,4 A · 5,25 h = 17,85 Ah