Quote:
Originally Posted by ConchZ2
Electrical Load Detector monitors the amount of current that’s being drained from the battery from devices such as headlights, HVAC, power amps etc.
Any high powered auto amp is going strain an under powered alternator.
A second battery is never a good idea as it's an added strain on the alternator to charge two batteries AND supply power for the car. The ONLY time a second battery is useful is if the audio system is to be used with the car off.
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Not trus the second battery takes the strain off the main battery and the main charging system. It allows the second battery to take care of the amp and the power it demands. Almost any of those links will recommend a second batter instead of a cap. And so would I.