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<blockquote data-quote="ColterDC" data-source="post: 7067980" data-attributes="member: 612869">I have a 96 Mustang GT that I added a 1200 watt amp and sub to using 4 gauge wire which is slightly bigger than the stock battery wires. Unsure of stock alternator amps, but it is a stock alternator.When I drive it the battery charge indicator slowly starts going down. Depending on whether the lights are on and other electrical equipment (especially the volume of the radio since there is not only the amp and sub I installed but also the stock mach sound system that has 2 amps of it&#039;s own) this drain can be very, very slow or slightly faster. The headlights never dim, etc, but the dashboard battery charge indicator will continually go down. I don&#039;t drive this car much and haven&#039;t driven it to the point that the indicator drops below 8.But here&#039;s where it gets a little weirder;I&#039;ll park the car with the battery indicator showing it almost to the &quot;N&quot; on the word &quot;NORMAL&quot;, but no matter what, the next time I go to drive it, which sometimes is a week or 2 later it always starts at the same charge rate which is around the R-M area of the word NORMAL and has no trouble starting.Thoughts?</blockquote>

[QUOTE="ColterDC, post: 7067980, member: 612869"] I have a 96 Mustang GT that I added a 1200 watt amp and sub to using 4 gauge wire which is slightly bigger than the stock battery wires. Unsure of stock alternator amps, but it is a stock alternator. When I drive it the battery charge indicator slowly starts going down. Depending on whether the lights are on and other electrical equipment (especially the volume of the radio since there is not only the amp and sub I installed but also the stock mach sound system that has 2 amps of it's own) this drain can be very, very slow or slightly faster. The headlights never dim, etc, but the dashboard battery charge indicator will continually go down. I don't drive this car much and haven't driven it to the point that the indicator drops below 8. But here's where it gets a little weirder; I'll park the car with the battery indicator showing it almost to the "N" on the word "NORMAL", but no matter what, the next time I go to drive it, which sometimes is a week or 2 later it always starts at the same charge rate which is around the R-M area of the word NORMAL and has no trouble starting. Thoughts? [/QUOTE]

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