Please HELP!!!, New alternator, but dead battery! Options

[str8thugginit4ya]

Ok, so I ordered a high output alternator and installed it today. Now as I finished installing the alternator, I cranked it up and let it run for a while. The battery I have in there right now is a Everstart ( one of the small ones ) and only had it for about 1 year. Never had a problem with it even when I installed my system. Now after installing the alternator, I started to crank up my system and then whole sound system cuts off? So I shut off my car for about 2 minutes, now when I go to start her up again, battery is dead! Even when i jump started it and had the car running the current was LOW! If I were to turn on my headlights, then my rev would drop and lights would dim. I have a Tsunami 1.2 farad capacitor as well. My whole system is a JL Audio 450/4 & an MTX 600/1. Is there some reason that my battery died just like that, and the current in the car is running low when it's started? I thought high output alternators was supposed to save your battery not kill it? My voltometer is reading about 9 volts when started and running! PLEASE HELP ME OUT!

[str8thugginit4ya]

This shouldn't be, because I compared it to the stock alternator, and it's WAY bigger than the stock alternator. Anyways, even if it were not pumping the full amount of amps when idling my battery still wouldn't die, would it?

[brthrurik]

This shouldn't be, because I compared it to the stock alternator, and it's WAY bigger than the stock alternator. Anyways, even if it were not pumping the full amount of amps when idling my battery still wouldn't die, would it?

If the alternator is putting out less than the vehicle is requiring then it will drain the battery because the alternator isn't keeping up. If your alternator is putting out 9 volts at idle it is not putting out enough because the vehicle is a 12 volt system. the capacitor is a temporary fix but only for low bass notes in your system. bring the alternator into an auto parts store and have it tested under load, they can tell you if it is putting out ample power.

When I installed my "high Output" alternator I also upgraded the battery and did the "big three". under load my alternator is putting out between 12.7 and 14.8 volts at approx 130 amps, at idle...