Capacitors or batteries?
Both capacitors and batteries can store and release electrical energy. Similarities and differences are listed below.
1. Both the electrical components can generate potential difference across another electrical component.
2. Both are used to store energy which can be tapped by connecting them in a closed circuit.
Battery stores electrical energy in the form of chemical energy, whereas a capacitor stores it in the form of magnetic field.
Batteries are smaller in size compared to capacitors.
Capacitors draw energy from the circuit, store and then release the energy. Batteries provide energy to the circuit.
Batteries provide a relatively constant voltage when discharging, whereas discharging voltage gets rapidly decreased for capacitors.
5. Cell voltage
1. The cell voltage of a capacitor is 2.3 to 2.75 volts.
2. Battery cell voltage is 3.6 to 3.7 volts.
6. Charging and discharging time
Charging and discharging is fast as compared to batteries. It is about 1-10 seconds, whereas charging time of the battery varies 10-60 minutes.
A battery is usually a DC component, whereas capacitor is mostly used for AC applications. It is used to block DC components in circuits.
8. Service life
The service life of a capacitor is about 10 to 15 years, the one of the battery is 5 to 10 years.
Batteries cost less.
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