10.2.3.b Rated capacity
Available capacity (designated as C20) is the amount of electricity (in A · h), which the battery pack can provide in a 20-hour discharge current with a current numerically equal to 0.05 of the rated capacity to a voltage at the terminals of 10.5 V at an electrolyte temperature of 25 °C.
Note
One shall always remember that it is necessary to install the battery pack of that capacity on the car, which is specified by manufacturer of the vehicle. Actually, nothing bad will happen. And the first time you will be happy to quickly start the engine. But do not forget that the possibilities of the generator are not limitless, and the operating conditions of the car can be very harsh. As a result, the larger capacity battery will be constantly short of energy for recovery. It will not be charged to 100%, which will soon lead to its failure.
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