Why not use capacitors to store power instead of batteries ?

[thastinger]

Hi,
We all know that capacitors are small electronic components installed in almost all of our normal house-hold day-to-day use appliances. A capacitor stores power and then releases at time of need.
I am thinking, that maybe large size capacitors may already available in commercial markets.
So why do not we use capacitors to hold & store power instead of batteries.
Life of capacitors must be much longer than batteries.

Any and all comments are welcome regarding the above.

Regards.

Omar

Large CAPS are available and we do use them to store energy, problem is that all CAPS discharge very quickly and then they are done until recharged, they are designed for a different purpose than a battery and thus are ill suited to deliver slow discharge over long periods like we need a battery to do.

[digimart]

Hi,
We all know that capacitors are small electronic components installed in almost all of our normal house-hold day-to-day use appliances. A capacitor stores power and then releases at time of need.
I am thinking, that maybe large size capacitors may already available in commercial markets.
So why do not we use capacitors to hold & store power instead of batteries.
Life of capacitors must be much longer than batteries.

Any and all comments are welcome regarding the above.

Regards.

Omar