Constant Resistance Discharge Mode:
- The current vs time discharge curve is similar to that of voltage
vs time. This is expected because of Ohm's law: V=(I) x (R), where
V=voltage, I=current, R=resistance. There is a direct relationship
between V and I at constant resistance.
- In comparison to the voltage and current, the power drop is
more rapid. This is the case because of the equation; P=V2/R,
where P=power. A decrease of V2 is more significant
than a decrease of V.
- Under this constant resistance mode, the current at the cut-off
voltage of 0.8V is 125 mA. This ensures a minimum operating power
of 100 mW. As the battery discharges at higher currents, the drain
in its capacity (ampere-hour) is more rapid, and hence, the battery
experiences a shorter service life. Note: Service life (in hours)
= Capacity (ampere-hours)/Current (ampere).
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