How much does this cost to the nearest dollar?

Gravity Audio 1000A Car Battery Capacitor WITH LED & Black Chrome
When a motor vehicle is running, the power for the electrical system comes from the alternator. Some very high power subwoofer amplifiers are capable of drawing more power from a vehicle's charging system than the alternator can produce. At very high output levels, this can cause the bass hits to begin to lose volume, punch, and overall clarity, and can cause lights to dim or flicker. When the amplifier tries to draw more power than the alternator can produce, the voltage in the power line to the amplifier (and everywhere else in the electrical system for that matter) begins to drop. As the voltage in the capacitor is still at 12V, the drop in voltage in the line will cause the

Price is $169.00
Price: $169