mixing battery groups

[hrtbrk1 5,000+ posts]

im more lost then i thought i would be

 

[hoss 5,000+ posts]

Everything audiolife has said is correct. Except for the part about monitoring your equipment regularly, dont do that.

 

[audiolife 5,000+ posts]

Does a battery make energy or store it?

It stores it so it is like a fuel tank right? So lets say you have a 10 gallon tank up front and a 20 gallon in back. Since they are different tanks they have different entry pipes of a different diameter. The entry pipe will equal to a batteries recharge rate as these pipes are what is filling up the tanks. Lets say they had different sized drain pipes to boot. This would be the discharge. With different sized entry and exit pipes and different sized tanks how will they stay balanced?

 

[audiolife 5,000+ posts]

Everything audiolife has said is correct. Except for the part about monitoring your equipment regularly, dont do that.

I seen a lot of guys fry amps because their back battery was worn down or out with the use of relays and isolators. In fact I know a good friend of mine that bought a used excide orbital to be put in back hooked up to a relay and ran it for over a year without knowing his used battery was basically dead the whole time he used it. He couldn't listen to his system with the engine off:laugh: and thats what he thought a relay did. Had he known wtf he was doing he could have gotten his money back for something that worked. //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

Relays when they kick on actually hurt batteries because it can send a slight spark to either or both batteries. Isolators generally create a voltage drop. Suppossively there is a way you can wire them so the alt makes more voltage to compensate for the drop but for the most part most of the guys I see have to use more batteries in back to get the same or better performance out of a straight wire job. There are pros and cons to doing or using each method. Anyone who tells you there is not a draw back to any of these methods is just passing on what they think is correct or trying to sell you something..I have ran all three ways. Course I am old feeble and blown up more shit in my younger days than I care to admit to.//content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

 

[99grandprixGT 5,000+ posts]

so you think i should charge my batteries ever month or something to make sure they at 100%?

 

[audiolife 5,000+ posts]

so you think i should charge my batteries ever month or something to make sure they at 100%?

would not hurt anything at all, and actually would in most probability keep the batteries in better condition.

 

[audioholic 5,000+ posts]

Dont forget that when we are discussing a front and rear mounted batt setup, the cable adds resistance between the two batts, creating an unequal drain situation anyway (stereo will tend to drain more from closer batt, avoiding cable resistance). And when charging, one batt is clearly closer to the alt than the other, thus experiences less cable resistance and sees more of the charge from the alt.

Keep that in mind when deciding you must have exactly the same batts, even from the same lot number. Things only really get that picky when you have a bank of batts in very close proximity connected via a bussbar, for example.

Someone earlier mentioned isolating the batts via a relay if they are not alike. I do not recommend this, as a relay still connects the two batts together to act as one, creating an uneven charge/drain situation. In this situation, use an actual isolator, leaving the relay setup for someone who has very similar batts.

 

[hrtbrk1 5,000+ posts]

Dont forget that when we are discussing a front and rear mounted batt setup, the cable adds resistance between the two batts, creating an unequal drain situation anyway (stereo will tend to drain more from closer batt, avoiding cable resistance). And when charging, one batt is clearly closer to the alt than the other, thus experiences less cable resistance and sees more of the charge from the alt.
Keep that in mind when deciding you must have exactly the same batts, even from the same lot number. Things only really get that picky when you have a bank of batts in very close proximity connected via a bussbar, for example.

Someone earlier mentioned isolating the batts via a relay if they are not alike. I do not recommend this, as a relay still connects the two batts together to act as one, creating an uneven charge/drain situation. In this situation, use an actual isolator, leaving the relay setup for someone who has very similar batts.

so should i be fine running a almost similar battery up top smaller one...and a bigger one on the back?

 

[Kicker Guy 10+ year member]

Does a battery make energy or store it? It stores it so it is like a fuel tank right? So lets say you have a 10 gallon tank up front and a 20 gallon in back. Since they are different tanks they have different entry pipes of a different diameter. The entry pipe will equal to a batteries recharge rate as these pipes are what is filling up the tanks. Lets say they had different sized drain pipes to boot. This would be the discharge. With different sized entry and exit pipes and different sized tanks how will they stay balanced?

Both actually //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

I was talking to scottie from powermaster about this and he told me to use the stock one under the hood. You already paid for it and it will not hurt anything.

 

[hoss 5,000+ posts]

How do you figure that a battery makes energy //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

 

[99grandprixGT 5,000+ posts]

im going to run the red top(already have)up front and either a, deka/powermaster/batcap in the trunk. eventually 2 in the trunk.

 

[Kicker Guy 10+ year member]

How do you figure that a battery makes energy //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

The chemical reaction inside the battery does give it a very slight charge.

 

[audiolife 5,000+ posts]

The chemical reaction inside the battery does give it a very slight charge.

Enough to power your stereo without having an an outside source? If what you are saying is true to the level at which it needs why do setting batteries die?

 

[Kicker Guy 10+ year member]

Enough to power your stereo without having an an outside source? If what you are saying is true to the level at which it needs why do setting batteries die?

You asked if they make or create, I said both doesn't mean they can keep themselves charged. If that was the case you would never need an alternator/charger. Hence why I said very slight, as in almost nothing.

 

[audiolife 5,000+ posts]

You asked if they make or create, I said both doesn't mean they can keep themselves charged. If that was the case you would never need an alternator/charger. Hence why I said very slight, as in almost nothing.

o0o I guess the actual creation of said battery matters to the consumer LOL