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When a battery is almost fully discharged there is a tendency for the:
  • A
    current produced to increase due to the reduced voltage.
  • B
    voltage to decrease even under light loads.
  • C
    voltage to increase due to the current available.
  • D
    voltage drop to be the same as for a fully charged battery under a given load.

Refer to figure.

In the attached figure, the extremity of the graph indicates when the battery is almost fully discharged. You can observe a tendency for the voltage to drop on both types of batteries. The main difference is that the lead-acid battery’s voltage is decreasing linearly, whereas the NiCad battery’s voltage drop is rather abrupt. This is because the NiCad battery has a pretty steady voltage output throughout its entire discharging cycle (while in use).

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