600w In Closet Grow My Car Battery Is Dying Quick Due To My 600w Amp. Should I Get A Capacitor To Solve This Problem?

My car battery is dying quick due to my 600w amp. Should I get a capacitor to solve this problem? - 600w in closet grow

The battery of my car is fast dying because my 600W amplifier. Should I a capacitor in order to solve this problem? What does a capacitor to do?