Putting in a switch for subwoofers

[Brian99SE]

Again cars fine unless i leave electrical on with car off, its just added precaution against draining the battery. Much cheaper than a new batter bc thats not the issue as ive replaced that already

With a Electorlyric Capacitor, They can go bad, When they do Theres a few methods of Failure.

First is Internal Discharge. Which in turn Causes the Capacitor to Consume electicity to replace when it is discharging. Creating a Constant current draw. Resulting in a dead battery. If that carries on..

Well. The outcome isnt too pretty.

Heres a Small Scale Cap rated at 560 uF (MicroFarad) and 200 Volts Standard Audio Cap is 1 Farad = 1,000,000 MicroFarad

So That little guy in that video is 1,785.7 Times Smaller than the Capacitor you are putting in your trunk.