you can't do one of them in a yellow top because it is a deep cylce battery so i would do both in a yellow top so you wont blow your alternator:crazy:
This is wrong...
The battery under the hood is meant to deliver max cranking amps for a short period of time. Regular car batteries do this.
Yellow top is meant to Be Deep-Cycled, like in a car audio system.
Use a regular battery under the hood, and the Yellow top in the trunk(separated by a relay. OR buy an optima Red Top for under the hood and use the Yellow Top in the trunk.(also separated by a relay)
- Thread Starter
- #4
If the alt keeps up and I don't listen to it with the engine off, is there any need for the deep cycle or should I just get a red top?
a deep cycle will still help out. But if you aren't running that much power, and you have a real strong alternator, then a red top would be fine.
-- -- --Personaly, i would run a red top under the hood, a yellow in the trunk (with a 1 farrad cap in between the relay and the 2nd battery) And eventually get the alternator rewound. That way you should NEVER have a problem.
-- -- --Personaly, i would run a red top under the hood, a yellow in the trunk (with a 1 farrad cap in between the relay and the 2nd battery) And eventually get the alternator rewound. That way you should NEVER have a problem.
bumpin_blazer
5,000+ posts
Only the Strong Survive
a 1 farat cap will give you less than .5seconds of backing power they are useless pieces of marketing crap IMO. i would say just do what ftgu said except for the cap.
adam
adam
I would absolutely NOT use two different types of batteries in a dual-battery setup. To answer your question, a deep-cycle battery is made for frequent charges and discharges. I would definately go with a yellow-top over a red-top just for the principle, but either will do fine.
violator5spd
10+ year member
Post Wh0re Hunter
i remember reading somewhere that it's not always good to have a deep-cycle battery under the hood because they sometimes fail? i'm not sure if that's true, but i was wondering about it...
The main point I was emphasizing though is not to use two different brands (especially not two different types of batteries) in the same setup.
For example, you should use either two red-tops or two yellow-tops, not one of each.
For example, you should use either two red-tops or two yellow-tops, not one of each.
This came from http://www.optimabatteries.com/faq.asp#q9
(i stand corrected about using a red top & a yellow top together)
9. Can I hook an OPTIMA up in parallel with my other battery?
No, when hooking batteries together in parallel they should be of identical make, model, and of similar age.
10. Can I use an isolator with an OPTIMA?
Yes, most any type of battery separator or solenoid can be used with an OPTIMA. The important thing to remember is that the charging voltage must be within the limits suggested by OPTIMA Batteries. If you are using an OPTIMA and a conventional battery, your system must charge each battery independently. Remember, some isolators cause a voltage drop, make sure your charging voltage AT THE BATTERY is sufficient. Continued undercharging of a battery will lead to premature failure and a drop in capacity.
11. Why does the OPTIMA last longer?
The main reasons the OPTIMA battery has a longer life are:
No shedding of active paste material. The SPIRALCELL design immobilizes the plates preventing the active past from working loose, which can cause plate to plate shorting.
High purity lead-tin grid. Grid material in OPTIMA batteries is more resistant to grid degradation. A type of internal corrosion that affects the plates inside a battery as it ages. Sealed design prevents loss of water which can lead to plate dry out and failure.
12. What is the difference between your deep cycle and starter battery?
The OPTIMA deep cycle battery utilizes a different chemistry for the active paste material on the plates, and a slightly stronger acid. This chemistry changes allows for a much longer life in cycling applications, with only a slight reduction in power.
13. What does deep cycle mean?
Deep cycle means using the battery in an application that will typically discharge 60% to 70% or more of the batter y capacity. An automotive battery is an SLI (starting, lighting, ignition) battery. It's plates are designed to deliver maximum power for a short duration. Starting a car typically discharges an SLI battery only 1% to 3%. When an SLI battery is used in a deep cycle application, or in a vehicle with heavy accessory loads, the battery life will be shortened proportionally to how deeply it is cycled on a regular basis.
14. When should I consider a deep cycle?
Any time you need the battery to supply all the operating power for a vehicle or other device. Additionally, deep cycle batteries should be used in vehicles that have heavy accessory loads where the alternator cannot maintain the battery in a fully charged condition.
(i stand corrected about using a red top & a yellow top together)
9. Can I hook an OPTIMA up in parallel with my other battery?
No, when hooking batteries together in parallel they should be of identical make, model, and of similar age.
10. Can I use an isolator with an OPTIMA?
Yes, most any type of battery separator or solenoid can be used with an OPTIMA. The important thing to remember is that the charging voltage must be within the limits suggested by OPTIMA Batteries. If you are using an OPTIMA and a conventional battery, your system must charge each battery independently. Remember, some isolators cause a voltage drop, make sure your charging voltage AT THE BATTERY is sufficient. Continued undercharging of a battery will lead to premature failure and a drop in capacity.
11. Why does the OPTIMA last longer?
The main reasons the OPTIMA battery has a longer life are:
No shedding of active paste material. The SPIRALCELL design immobilizes the plates preventing the active past from working loose, which can cause plate to plate shorting.
High purity lead-tin grid. Grid material in OPTIMA batteries is more resistant to grid degradation. A type of internal corrosion that affects the plates inside a battery as it ages. Sealed design prevents loss of water which can lead to plate dry out and failure.
12. What is the difference between your deep cycle and starter battery?
The OPTIMA deep cycle battery utilizes a different chemistry for the active paste material on the plates, and a slightly stronger acid. This chemistry changes allows for a much longer life in cycling applications, with only a slight reduction in power.
13. What does deep cycle mean?
Deep cycle means using the battery in an application that will typically discharge 60% to 70% or more of the batter y capacity. An automotive battery is an SLI (starting, lighting, ignition) battery. It's plates are designed to deliver maximum power for a short duration. Starting a car typically discharges an SLI battery only 1% to 3%. When an SLI battery is used in a deep cycle application, or in a vehicle with heavy accessory loads, the battery life will be shortened proportionally to how deeply it is cycled on a regular basis.
14. When should I consider a deep cycle?
Any time you need the battery to supply all the operating power for a vehicle or other device. Additionally, deep cycle batteries should be used in vehicles that have heavy accessory loads where the alternator cannot maintain the battery in a fully charged condition.
avistar23
10+ year member
www.SoundhertZ.com <---
interesting ...very
are they worth the money if your alt can handel the load
CarAudioAddict
10+ year member
What did I do now?
First off - YES you can use two different batteries as long as they are both 12-volt. With your set-up the two batteries are never joined together so there is no problem.
Go with a deep-cycle battery for the stereo and a regular battery for the car itself.
I would get a battery isolator instead of a relay switch, more reliable and 100% automatic.
An even better set-up would be to have two completely separate electrical systems (2 alts, 2 batteries). This way the two systems are completely independant and you don't have to worry about isolators or relays at all.
Go with a deep-cycle battery for the stereo and a regular battery for the car itself.
I would get a battery isolator instead of a relay switch, more reliable and 100% automatic.
An even better set-up would be to have two completely separate electrical systems (2 alts, 2 batteries). This way the two systems are completely independant and you don't have to worry about isolators or relays at all.
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