Alternator & Battery help

[Boom_box 10+ year member]

I just tested my battery's voltage. When the car is off the meter reads about 12.5 V but when I start my car it drops down to 10 V. Now, when the car is running the meter reaches 13 V but when I play my system (with the AC and lights on) it drops down to about 11.09 V and my sounds weaker after a while.

Will this become a problem?

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[johnecon2001 5,000+ posts]

well considering that the car is ment to have the charging system at around 13.5v all the time.. what do you think?

Do the Big 3. Go get a better battery and start thinking about a High Output alternator.

 

[Alpineinstaller 10+ year member]

Will this become a problem?

That is a problem.

 

[Hook Me Up 10+ year member]

yes it is

 

[Boom_box 10+ year member]

You think a bigger capacitor will do? I only have a 1 farad cap now. I was looking around for a high output alternator but i can't seem to find one coz my car is pretty new. I just got it this January. Do any of you know where I can get a High output alternator for a Mazda 3?

 

[chinny 5,000+ posts]

cpacitors wont do shit.. buy a better battery not a better capacitor.