Adding a third sub/second amp, (battery help)

[ownage9 10+ year member]

With my current setup, my battery somewhat takes a beating. I can see the headlights dim sometimes, and often I see other interior lights dim when im pounding my subs. What would I need to do when I add my second amp and third sub to prevent the battery from not getting enough power? Someone mentioned a capacitor? Whats that do? Also, I heard putting a second battery in the trunk? How would I manage that so it would re-charge? Any help appreciated.

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[slicks5150 10+ year member]

try a deep cell battery . . .the second batt in the trunk would be good for parking lot booming with the car off.

 

[ownage9 10+ year member]

But what would the battery in the trunk charge off of? Also, how hard is it to hook another battery up in the trunk?

 

[stones 10+ year member]

Read this-

http://forum.sounddomain.com/forum/ultimatebb.cgi?ubb=get_topic;f=5;t=009326;p=

lots of good info on adding extra batterys.

 

[SSS 18734 5,000+ posts]

I think a new alternator may be more of a concern for you than adding batteries

 

[cappy72 10+ year member]

With my current setup, my battery somewhat takes a beating. I can see the headlights dim sometimes, and often I see other interior lights dim when im pounding my subs. What would I need to do when I add my second amp and third sub to prevent the battery from not getting enough power? Someone mentioned a capacitor? Whats that do? Also, I heard putting a second battery in the trunk? How would I manage that so it would re-charge? Any help appreciated.

first upgrade the big 3...

then get a yellow top...

then add another battery to the trunk...

then get a high output alternator...

then consider getting a new car