its not useless , its just not as good as an extra batterythrow away the capacitor it is useless.
x2.. best use for it..Throw the capacitor at a sign....going down the freeway....don't do it with a cop behind you....
no alt.. just mayybe a kinetik hc600 or somethingnah dude its 2 sony xplod 1000 watt 400 rms amps i know they **** but what do i need then for my shit not to dimm out and alternator going bad? get a different alternator or what?