Fiamm Neptune 100A agm battery

[toniocask]

Hi everyone,
what about this battery?
my 3 Tudor 115 ampere dosn't work fine now( 7 years life )

I find this Fiamm Neptune 100 ampere on the web, around 180 euro,
look like a good service battery.
What think you about ?
I have a S.O.42i 2008 
Thank's
Antonio.

[rene460]

Hi Antonio,

i don't know that particular battery, but the issue is more what capacity you need for your type of sailing.  Seven years from your Tudors is definitely better than average.  They must suit your use cycle pretty well, and probably have sufficient capacity for your use otherwise you would probably have had to replace them long ago.  So if the proposed new batteries are similar capacity, similar chemistry and suitable for similar deep cycle or cranking capacity, and of course if they are similar dimensions so they will fit your battery compartments, then they can be expected to do the job.  Similar terminals also help the changeover.  There are several threads on battery types on this forum that discuss all the issues, well worth searching through and reading before you buy.
I hope this helps
rene460

[Mistroma]

The standard Tudor 110Ah batteries fitted to my 42DS started to fade after only 3 years and it's widely accepted that they aren't proper deep-cycle batteries. I went for Trojan T105s because I live on the boat for 6-7 months each year. They were the cheapest option for me but required a rebuild of the battery box.

As already mentioned, it sounds as if you don't really need decent batteries if you got 7 years from the fairly grotty Tudor lorry batteries. I'd question the need for AGM if cheap flooded batteries gave you 7 years life. Why not consider cheap leisure batteries for under half the price of the AGMs.

[toniocask]

Thank's..
what kind/brand of battery you suggest?

I prefer agm tecnology because they don'have problems of gas exaust or position,
dont' forget that in our boats battery are under the beds..

In my experience, Tudor battery's are great, they don't sell it more :-(

P.s.
I go each day on board, to sailing or to work on it :-) I need power
Antonio.

[rene460]

Hi Antonio,

You do not say what load you draw or what recharging facilities you use.  The life of your Tudors suggests that you do not abuse them by deep discharge.  Do you run a fridge or an auto-pilot?  Even a small GPS display draws an amp or more while running.
If you only sail during the day with minimal instrumentation, you appear to have plenty of capacity.  Or do you preserve your batteries at the cost of frustration that comes from restricting the equipment you want to use?  Or perhaps a big solar panel supplies all your needs and the batteries only ever experience minimal depth of discharge?  Perhaps you are able to recharge from a mains supply each night at the end of your sail.

If the capacity is adequate and the batteries fit the available space, buy the best available from you local supplier, and get the right advice on any changes to settings on your charging systems.  Solar regulators and mains chargers these days have different settings for different battery chemistry.  Personally I have AGM type and I would hope to get better life than conventional lead acid.  But probably not more than seven years.  I suspect the good batteries from reputable manufacturers are all similar quality, though someone will almost certainly argue.  I for one still believe you get what you pay for.  As Mistroma suggests you may be paying more than you need for AGM, but I doubt that they will disappoint you.

rene460

[toniocask]

Thank you for your information.
I hope that the new one endure the same 6/7 years.

My question was different, anyone knows these batteries?