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Old 11-16-2005, 04:19 AM   #1
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I have been given two 110amp batteries, can i wire them up with my existing two 95amp batteries.
Some people tell this is a no no, others that the small differance will not matter.
Has any of the battery companys got any data on this?

Thanks olley
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Old 11-16-2005, 04:19 AM   #2
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I have been given two 110amp batteries, can i wire them up with my existing two 95amp batteries.
Some people tell this is a no no, others that the small differance will not matter.
Has any of the battery companys got any data on this?

Thanks olley
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Old 11-16-2005, 04:31 AM   #3
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You can, but the weaker batteries will draw the stronger ones down tho thier level/ability. It's usually not advised, but nothing will blow up.
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Old 11-17-2005, 12:32 AM   #4
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One webiste http://www.windsun.com/Batteries/Bat...ery%20Charging
has some good info on batteries. They should be the same age and type to give you the best performance. Good luck.
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Old 12-29-2005, 11:21 AM   #5
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It is suggested that should not be done, however with the use of diodes (or battery isolators) it can be done. The diodes do not allow the batteries to see each other but allow them to work in parallel on the load.
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Old 01-08-2006, 05:33 AM   #6
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Another idea is to put in a switch. That way you can select battery bank 1 and use it, then when it's drawn down switch over to battery bank 2.

Lots of boats have this setup. Switches cost from $20 to $80 depending on design and quality.

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Old 01-08-2006, 05:59 AM   #7
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The difference in amp-hour ratings is insignificant. What matters is any difference in condition or age, becasue a weak battery will draw done those in batter condition.

If they are all wet cells, you can check the specific gravity in each cell of each battery. I would not use any battery that had a cell that gave a markedly lower reading than all of the others. Another technique would be to have each battery load tested and discard any that were significantly lower than the others.

You may even find that your "new" batteries are much better than your existing ones and you will want to discard the existing ones so they don't draw down the newer ones.
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