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Old 10 December 2010, 08:10   #1
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Batteries

Hello, I have the wiring for two batteries on my Osprey Eagle and just wanted to know if I would have to get certain 12 volt batteries ! I have bought batteries in the past for cars and was told that different cars used different 12 volt battery types. Is it marine batteries that I would have to buy ? Thanks for any help. Mark
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Old 10 December 2010, 09:10   #2
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Normal car batteries for me or truck batteries on larger diesels.
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Old 10 December 2010, 09:53   #3
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A two battery set-up on a boat either means you have two engines with a battery each, or one engine and a domestic battery to supply all the electronics independant from the engine. The 'spare' battery is also useful if your main engine starting battery dies for some reason.

In a perfect world, you would select a standard car type starting battery for the engine and use a deep cycle leisure battery capable of deep discharge for the domestic side. Alternatively you just buy a couple of cheap Halfords batteries and get on with life . You may need to replace them every 5 or so years though .
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Old 11 December 2010, 18:10   #4
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You pays your money & makes your choice. I want to be sure that the engines will start, especially if we have divers in the water (me!!) Can't go wrong with Optima blue tops, but you pay for 'em Never let me down on 3 boats.
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Old 12 December 2010, 15:27   #5
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Originally Posted by Pikey Dave View Post
Can't go wrong with Optima blue tops, but you pay for 'em
When I shopped for blue tops (have been excellent btw) I found a wide range of prices out there.....pays to shop around
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Old 12 December 2010, 15:29   #6
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Wait until you get an engine and check the spec of battery it requires.
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Old 12 December 2010, 15:37   #7
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Wait until you get an engine and check the spec of battery it requires.
That's good advice, it will set the minimum size for you. Optima batteries have a huge following and the battery often seen in land rovers, though there are other manufacturers banging out top quality products.
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Old 13 December 2010, 02:59   #8
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Wait until you get an engine and check the spec of battery it requires.
AND the size of the battery leads If the batteries are in the console it might be 5-6m away from the engine. The lead size will start to go up & the price with it.
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Old 13 December 2010, 18:53   #9
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One of my batteries has started giving up the ghost after just over two years. I ended up just buying 88Ah leisure batteries again and they always worked fine till the last few weeks. I reckon I just have a duff plate in one as the battery voltage is low on the duffer.
I bought two for 100 delivered and after checking the price of "bluetops" I reckon I could replace both of them three or four times over for the same cost as one set of them.
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Old 14 December 2010, 03:56   #10
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Ah, but how many of those failures are going to happen at a convenient time when your boat is not away from home and your'e near a Halfords to pick up a replacement?
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