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Old 05-03-2004, 10:39 PM
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running two batteries

i have a pretty serious soundsystem in my camaro, with a 105 amp alternator it still trips off all my electrial accessories at high volumes. so i went to the store to look at capicitors...1/2 farad cap 100 bucks. i said f that and went to the parts store and bought a small battery for 35 bucks...my question is will 105 amps be enough to charge 2 batteries, and should i run the batteries in a series or paralell?

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Old 05-03-2004, 10:50 PM
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Run them in parellel, unless you want to blow everthing in the car with 24 volts.

Series will give you 24 volts, which you don't want.
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Old 05-04-2004, 12:03 AM
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ok thanks alot, but im still worried about the alternator charging the batteries, 105 amps is more than enough for one battery, but is it enough for 2?
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Old 05-04-2004, 02:49 PM
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well i installed the battery in the trunk today, it works great. the alternator seems to be charging fine, but i guess i'll see as i drive it more. i dont have a load tester so i guess that the only way to find out
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Old 05-04-2004, 05:48 PM
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I'm not sure how strong the batteries your using are. If for some reason you have to switch back to using one get the A/C Delco battery for cars with a police package, they put out 1000 cranking amps and hold up very well. The last one we had in a Caprice for over 9 years and it was working fine, I got rid of it only because of its age.


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Old 05-04-2004, 11:29 PM
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The only problem I see is charging the extra battery if it gets too low. I used to work on RVs and saw a lot of problems burning up alternators that are trying to charge coach and chassis batteries. Standard alternators are not made for heavy charging of low batteries but as you have stated you are using a 105 amp alt. Limo alternators are heavy duty alts designed for constant duty cycle. Heat is the big factor in alt life. You should be ok in your application, just keep an eye on the system for overheating or charging for too long a time. Alternators get so hot you cant touch them when you work them so hard. If your batteries are low charge them with a battery charger. Dont charge them with the alt if the're run down.
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