When John first bought his new house, he could mow the yard in the morning and then go for a run in the afternoon. John, who is now in his late fifties, finds that mowing the yard completely wipes him out for the day. John is experiencing a decline in his reserve capacity.
RC is a general measure of how long a new, fully charged battery can keep critical accessories running in the event of a vehicle's alternator failure. This indicates how many minutes the battery can deliver a constant current of 25 amps at 80°F without dropping below the minimum voltage of 1.75 volts per cell required to keep the vehicle running.
The Battery Council International (BCI) has created a set of standardized specifications to help consumers transition to their next product. Cold cranking amplifier is one of these specifications, as is reserve capacity. So what is reserve capacity? This is a time measurement that describes how long a fully charged battery can deliver 25 amps of current in an 80°F environment before the battery discharges to 10.5 volts.
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