Marine Batteries

Firstly batteries on boats should be sealed now and thats compulsary for charter coded bosts.

Just replaced my batteries that were original tudor leisure batteries - all 4 were 110Ah and lasted 8 yrs. Batteries were still OK but boat is marina kept and regularly used & with 4 weeks away sailing thought they owed me nothing.

Looked at all the suppliers and obvious that most supply the same batteries (look at case features) with different names on. Finally went with Battery megastore as they gave me the best price and were one of the few that recommended a separate engine cranking battery.

For same size as Tudor got 3 x 125Ah DC31 and 1x MF31 1000 cranking battery. Only time will tell actual durability but warantee is 4 yrs (Tudor that lasted 8 yrs was 2yr warantee!!)
 
Just had to replace my Numax after under 2 years, as i was putting them in the disposal place at the Marina, one of the staff came up and asked me how long i had had them, told him, he said they were bloody useless in his opinion as he had binned his pair in 18 months, so keep away imho.
 
davidfox said:
Just had to replace my Numax after under 2 years, as i was putting them in the disposal place at the Marina, one of the staff came up and asked me how long i had had them, told him, he said they were bloody useless in his opinion as he had binned his pair in 18 months, so keep away imho.
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Tanyia batteries who supplied my 4 batteries didn't want to know - said I should not charge them at 14.8V - well yes - thats what destroyed them - but thats because they were poorly made batteries!
 
davidfox said:
Just had to replace my Numax after under 2 years, as i was putting them in the disposal place at the Marina, one of the staff came up and asked me how long i had had them, told him, he said they were bloody useless in his opinion as he had binned his pair in 18 months, so keep away imho.
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On the flip side I have had Numax 110A/hr batts installed for the last 4-5 years, I think this is their 5 season, they are charged using a Sterling unit on the engine, or a sterling mains charger. This is the first year I have noticed that they are not quite as good as they where so it may be that I change them this winter. They are not "marine" batts but Numax leisure from a camping shop. I don't expect them to last for ever but cheap enough that I'm happy with a 5 year life.
 
Chris_Robb said:
Tanyia batteries who supplied my 4 batteries didn't want to know - said I should not charge them at 14.8V - well yes - thats what destroyed them - but thats because they were poorly made batteries!
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Whenever I have checked the voltage on the batteries via a built in voltmeter it always registers over 14volts whilst it is charging does that sound good?
 
davidfox said:
That's about what I see, so all seems ok then!
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To really know what is happening with your batteries - especially the house batteries - forget the engine battery - that should be reserved for engine only, you need to get a combined amp volt meter such as the Nasa BM1. Not difficult to fit but will show you the charge rate, what voltage you are at, the percentage of charge and most importantly, you get to know what amps your fixtures and fittings are taking. Not expensive but well worth the trouble fitting which can be done by an ammeter - sorry an Ameteur - bloody spelling checker!!!
 
Steve_N said:
I bought a pair of these from Tayna on Ebay a while back.
I chose them because they aren't sealed and have good old screw caps.
Can't fault them so far.

http://www.ebay.co.uk/itm/271147959514
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That looks good. Did they charge for delivery to Fife? I didn't like this bit:

IMPORTANT! The quoted delivery cost covers mainland UK below and including Glasgow and Edinburgh. Our courier may not be able to deliver above Glasgow/Edinburgh or to IOM/IOW/NI etc. Please call us on 01745 823399 to discuss delivery to these places.
 
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