mixing battery groups

[hrtbrk1 5,000+ posts]

someone get my question please

 

[audioholic 5,000+ posts]

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

So long as they are of the same age/condition and general design, it should be fine.

 

[hrtbrk1 5,000+ posts]

thanks bro

 

[audiolife 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.

So adding to the difference between a front and rear battery is ok since the wiring will already create a difference? //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif//content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

 

[audioholic 5,000+ posts]

So adding to the difference between a front and rear battery is ok since the wiring will already create a difference? //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif//content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

No. The much smaller difference between lots of batts wont amount to nearly the difference in charge/recharge discrepancies as will mounting the batts a good distance away from each other. Again, due to resistance in the wire. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[audiolife 5,000+ posts]

No. The much smaller difference between lots of batts wont amount to nearly the difference in charge/recharge discrepancies as will mounting the batts a good distance away from each other. Again, due to resistance in the wire. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

LOL just checking..also if you have a large bank of batteries it is a good idea to spead the load around in the bank. Meaning if you have 5 amps and 10 batteries even though the batteries are all connected it is far better to hook up each amp to 2 batteries rather than hooking up all 5 amps to one set of terminals in the bank. Especially if we are dealing in 1000's of amps of draw

 

[audioholic 5,000+ posts]

LOL just checking..also if you have a large bank of batteries it is a good idea to spead the load around in the bank. Meaning if you have 5 amps and 10 batteries even though the batteries are all connected it is far better to hook up each amp to 2 batteries rather than hooking up all 5 amps to one set of terminals in the bank. Especially if we are dealing in 1000's of amps of draw

Yep. Again because added resistance in wiring/connections will mean the amplifiers would draw more current from the batts in the bank that are closest to the terminal connection. That again is getting pretty picky though, and something most people wont ever need to consider. For the average user, just getting batts that are similar in design and age/condition should be good enough.
Cheers.

 

[audiolife 5,000+ posts]

Two different sized batteries can have a bigger difference in charge and discharge rates than an age factor. It is far from ideal. You can do it and it would work but it is only minorly better than mixxing technologies.

 

[audioholic 5,000+ posts]

Two different sized batteries can have a bigger difference in charge and discharge rates than an age factor. It is far from ideal. You can do it and it would work but it is only minorly better than mixxing technologies.

Yes that is true. At some point if the differences are big enough, or you are worried enough about it, you can just hook up an isolator and forget all these worries between front and rear batts. And I never recommend paralleling multiple batts of different sizes in a bank.

 

[hrtbrk1 5,000+ posts]

wow ive learned a lot...thanks guys