To answer this question correctly, we may need more information.
If the question is about an automotive battery, then:
Reserve capacity minutes (RCM), also referred to as reserve capacity (RC), is a battery's ability to sustain an electrical load; it is defined as the time (in minutes) that a lead-acid battery at 80 °F (27 °C) will continuously deliver 25 amps before its voltage drops below 10.5 volts.
reserve capacity  noun Automotive .the capacity of a battery, measured in minutes, to keep a vehicleoperating if the charging system fails.
Eight million pennies is $80,000. The man has $64,000 after the 20 percent reserve is meet. The banks capacity is $16,000.
capital reserve is not a free reserve
Amalgamation reserve means the expenses bear by Transferee company for amalgamation with Transferor company is treated as reserve, this reserve is called as amalgamation reserve
consolidated revenue reserve
The capacity of the lake tank at the nature reserve is 500,000 gallons.
reserve capacity  noun Automotive .the capacity of a battery, measured in minutes, to keep a vehicleoperating if the charging system fails.
Unused credit lines
Vital capacity is the amount of air you can breathe out after a maximum inhale. When it comes to determining vital capacity it’s basically calculated by the inspiratory reserve volume in addition to the expiratory reserve volume.
It's the inspiratory reserve volume plus the tidal volume plus the expiratory reserve volume
Expiratory reserve volume, tidal volume, inspiratory reserve volume, you amateurs
residual (reserve) volume
Expiratory reserve volume, tidal volume, inspiratory reserve volume, you amateurs
14 AND 7/8THS US GALLONS NO RESERVE TANK.
The cardiac reserve capacity is the difference between the rate at which the heart pumps blood and its maximum capacity for pumping blood a any given time. It's the potential capacity of the heart to function well beyond its basal level.
The Inspiratory reserve volume (IRV) is calculated by subtracting the tidal volume and expiratory reserve volume from the total lung capacity. In this case, the total lung capacity is the sum of the active capacity and the expiratory reserve volume, which equals 5660ml. Therefore, the IRV would be 5660ml - 500ml - 1300ml = 3860ml.
Fuel capacity; Fuel Tank 4.17 US GAL Reserve capacity; 0.58 US GAL