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Old 02-23-2015, 08:35 PM   #1
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alternative to

is there an alternative to size 8d batterys i just got sticker shock when i looked at 8d battery price
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Old 02-23-2015, 08:37 PM   #2
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Have you tried Rural King?
I think they may have 8D's for under two hundred bucks.
Or you could go with two group 31's.
I got mine at Rural King on sale for like $75.
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Old 02-23-2015, 09:09 PM   #3
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east coast on the 31s do you wire them in series.
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Old 02-23-2015, 09:46 PM   #4
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local napa can get it for 192. 1400 cca and 430 min stand by
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Old 02-23-2015, 09:49 PM   #5
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Parallel.
If you search online there should be lots of pics and info.
On here lots of folks prefer the 8D's but on lots of truck and bus commercial operator oriented forums, it seems the opposite.
I just went the cheap and also easy route and replaced my stock setup of two 31's. But if it gets super cold and your bus is a slow starter then three may be needed. But I doubt that.
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Old 02-23-2015, 09:51 PM   #6
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Its Not to cold here in fla did u wire them in series or parallel
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Old 02-23-2015, 10:09 PM   #7
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Sorry, yeah they are parallel.
Two 12v's in series would be 24v wouldn't it? No matter how many you hook up in parallel it would only be 12v.
You *could* *maybe* even get by with one battery here in Fl. Mine started and ran from just one till I bought a second.
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Old 02-23-2015, 11:02 PM   #8
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Here's proper parallel cabling for two batteries. Note that the positive cable attaches to one battery while the negative cable attaches to the other. This keeps both batteries equally charged. Parallel cabling with two 12v batteries essentially gives you you one big 12v battery with double the amp hours.



Price out your battery options both ways (two size 27 or 31s or the 8D, if that's what it is) and add two new battery cables if you go with a pair. You may be better off with one big battery than two smaller ones.
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Old 02-24-2015, 11:44 AM   #9
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Also, with a two-battery system, if one of the pair fails you still should replace both. Adding a new battery to a not so good one makes both not so good. The weaker battery will pull down the stronger one. The conventional wisdom is to get two batteries with the same date code so there's no age difference.
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Old 02-24-2015, 11:50 AM   #10
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I work for mine here in fl I'm able to buy both the 8d and the 65 for $225 for both.
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