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Old 22 July 2005, 04:19   #11
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Country: UK - England
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Boat name: Plastique
Make: PRO Sport
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Hi

The changing of the electrolyte fluid has always been an option I have been told not to use, it seems like a good idea but it has something to do with the depletion of the metal plates in the battery and as it's somewhere in a charge/use cycle the fluid is no longer just sulphuric battery acid. Also when the battery has ever been deeply discharged it never seems possible to get a decent performance from it again. Good thinking to have your booster pack. No chance of the second battery being flat from someone leaving the selector on the wrong one and realising it's not an idiot proof system. I have never thought to work the battery science bit out but am happy to take the word of people who have tried.

By the way, Costco have marine/leisure batteries by Bosch for £30 something. I am sure you have a card or know someone that can get you in.

Hope to see you out on the water soon.

Scott & Mags & Plastique
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Old 22 July 2005, 05:03   #12
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In conclussion....

....it would appear that the best course to follow is to replace the battery which I will do this weekend. Thanks to all.... COSTCO - yep have card, will take a look.
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Old 26 July 2005, 08:15   #13
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Country: UK - Wales
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Boat name: DynaMoHumm/ SRV/deja
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I only buy Exide Ultima batteries for my boats! They are immensly powerful and very compact and have a rapid charge time.

Unfortunately they are rather expensive!
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Old 26 July 2005, 10:53   #14
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Be a little cautious about leisure / marine batteries. There main use is for caravans, yottie types, who need to be able to pull low current from a battery over long periods, and a battery that doesnít mind being fully discharged. They donít necessarily provide a high stating current.

For a rib, assuming you donít have an auto bilge, or spend hours and hours sitting with the electronics on and the engine off, you want a battery which provides the highest possible cranking amperage, to ensure your motor spins as quickly as possible to ensure good starting.

Agree with Rogue re Exide Ultimas, but out of my price range! Fitted Delphi Freedoms (std automotive battery) last time and have performed well so far.

HTH

David
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Old 26 July 2005, 16:33   #15
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I've had similar problems recently, but with a 2003 battery supplied by dealer. Also had geen lighrt and full electrolyte, but after left the auto bilge pump for one week the battery was a dodo.

Will check leakage, but if that's ok will also look for new battery. Was thinking of one of the marine gel types, but they are v v pricey. Anyone got any experience with these. Worth the extra money?
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Old 27 July 2005, 04:07   #16
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We use a "Optima" spiral battery on the BananaShark leisure boat with a 225 Optimax fitted. We also have one of those auto bilge pumps that turns on every few minutes to see it there is any water in there and it's been fine - a bit pricey but worth it for reliable power!
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Old 27 July 2005, 12:16   #17
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Not sure about spending lots of money on a good battery for a rib.

Batteries love to be used, start the car in the morning, 50 miles up the motorway for the battery to charge, followed by 8 hours in the car park for the battery to balance out is ideal regular, not too demanding work is what a battery needs.

But on a rib you charge it up in March and expect it to work like crazy until the end of September when you leave it until the following year. It lives in a nasty, salty, bouncy, wet environment and has to cope with poor quality charging and poking lots of amps down long cable runs

I think that expensive batteries really only come into their own when they are used at the extremes of what they are capable of and when you then expect them to last for years, such as in a commercial work boat Repeatedly cranking big cold diesels works the battery hard and over time a battery will deterrent because, in simple terms, the plates loose mass as a by product of the process.
The Ďlost massí, which is on the whole lead sulphate, accumulates at the bottom of the battery and ultimately either shorts the battery by touching the bottom of the plates or the plates run out of lead, at this point the battery dies More expensive batteries have more material in their plates and or more space at the bottom of the battery and so last longer

Under-used or idle batteries will slowly loose performance as a result of lead sulphate building up on the surface of their plates and unless you remove this by cycling the battery (charge / part-discharge) this shortens the life of the battery

Additives, battery pills and boost chargers will temporarily lengthen the life of a battery but nothing beats regular use On one car I owned I had almost 10 years use out of a battery just because it was in daily service (100 mile round trip to work).

But if you are not cranking a big diesel it is probably a waste of money buying anything too expensive
Get the cheapest battery with a guarantee you can find and replace it every year under warranty just donít say you are using it on a boat. Des
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Old 28 July 2005, 05:30   #18
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Well again.......

.....thanks to all for their advice. Over the weekend I took the bat' of and had it tested. As thought it was as dead as a dodo. The local chandler quoted me £89.00 - no thanks mate. I went to costco last night and the same battery was £48.00 but hey - no thanks mate. This morning I went to my local back street car accessory shop where they had just what I wanted for £40.00 - cheers mate I'll take it.

As advised above, it's under warranty and as 11 months I'll whip it off and have it replaced. I know the guys in the shop well and feel confident they will assist. It's a 110 from Delta Batteries in Bury Lancs.

Cheers boys.............
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Old 28 July 2005, 05:44   #19
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.....As advised above, it's under warranty and as 11 months I'll whip it off and have it replaced. .............Cheers boys.............
I want 10% commission for that tip Des
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Old 28 July 2005, 05:55   #20
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Originally Posted by MeMe
.....thanks to all for their advice. Over the weekend I took the bat' of and had it tested. As thought it was as dead as a dodo. The local chandler quoted me £89.00 - no thanks mate. I went to costco last night and the same battery was £48.00 but hey - no thanks mate. This morning I went to my local back street car accessory shop where they had just what I wanted for £40.00 - cheers mate I'll take it.

As advised above, it's under warranty and as 11 months I'll whip it off and have it replaced. I know the guys in the shop well and feel confident they will assist. It's a 110 from Delta Batteries in Bury Lancs.

Cheers boys.............
11 months time it just may be fine
My tip is if you do not use the boat in winter take it off the boat, make shaw it's charged & store it some where dry & worm
Nick
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