Answer Posted / krishnendu

A 5V Battery is constant voltage source.Unlike capacitor it can be used for comparatively long time as a voltage source. And finally battery becomes useless because its internal resistance will increase and no current will be available from the battery but the voltage will remain same if measured.

In case of capacitor it only stores charge for a certain time period RC. Its voltage continuously decreases during discharge and finally reaches zero on completion of discharging.

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