What's the life expectancy of Numax sealed batteries?

[SlowlyButSurely]

My boat has two Numax XV31MF 110Ah sealed batteries which are now 7 years old. The alternator is a Lucas A127 which charges at 14.4 amps. There is no smart regulator fitted and the batteries are connected via a 1/2/both switch arrangement.

The batteries are working perfectly at the moment but we are going cruising for a couple of years soon and I don't want them to give up the ghost while we are away. Should I change them before we go?

 

[sailorman]

for £160 > 180 just do it
may last lot did 5 yrs & before that it was 7 yrs

 

[Cloven]

I have two of exactly the same batteries, currently also about 7 years old. Although they are OK, or at least were, at the end of last season, I am thinking about changing them now although my situation is a bit less stressful than yours should they give up the ghost. I use these as the domestic bank with a separate starter battery which I changed last season afer 10 years use. Currently a good price from Tayna.

http://www.tayna.co.uk/search/numax Xv31mf

What are you thinking of changing them for? The reason I ask is that Numax class these as dual purpose batteries. Nothing wrong with that I suppose but perhasp could do better if only for domestic.

 

[Georgio]

for £160 > 180 just do it
may last lot did 5 yrs & before that it was 7 yrs

my last set of batts were Numax and lasted about 7 years, thy could have carried on a bit longer but were clearly getting towards the end.

for peace of mind while away I would swap out for new. also you may be able to get more capacity now in the same footprint - I did.

 

[sailorman]

I have two of exactly the same batteries, currently also about 7 years old. Although they are OK, or at least were, at the end of last season, I am thinking about changing them now although my situation is a bit less stressful than yours should they give up the ghost. I use these as the domestic bank with a separate starter battery which I changed last season afer 10 years use. Currently a good price from Tayna.

http://www.tayna.co.uk/search/numax Xv31mf

What are you thinking of changing them for? The reason I ask is that Numax class these as dual purpose batteries. Nothing wrong with that I suppose but perhasp could do better if only for domestic.

These are rebaged batteries all have 31 in the code

 

[SlowlyButSurely]

It's a simple setup, the batteries are used for both engine starting and domestic circuits. When sailing or anchored we turn one battery off to preserve it for engine starting.

I was going to replace them with two more of the same but any alternative suggestions would be welcome.

 

[Sadlermike]

I have two Numax domestic batteries. I am on my third pair. Both my previous two pairs lasted three years. I live aboard an average of ten months per year and consider this an acceptable lifespan.

 

[KellysEye]

I would change them 7 years is unusually long for batteries it's normally about five years.

 

[Cloven]

These are rebaged batteries all have 31 in the code

What do you mea by "rebadged". Are they not genuine Numax or are Numax something else that has been rebadged? I have seen a very similar battery from Lucas, the LX31MF

http://www.ebay.co.uk/itm/12V-110AH...ne-Range-Motorhome-Caravan-Boat-/190918580386

 

[sailorman]

What do you mea by "rebadged". Are they not genuine Numax or are Numax something else that has been rebadged? I have seen a very similar battery from Lucas, the LX31MF

http://www.ebay.co.uk/itm/12V-110AH...ne-Range-Motorhome-Caravan-Boat-/190918580386

These are imports with a variety of labels to match the re seller

 

[SlowlyButSurely]

Thanks for all the input chaps. The consensus seems to be that the game is up and the batteries are due for replacement. This has been a great help.

 

[sailorman]

Thanks for all the input chaps. The consensus seems to be that the game is up and the batteries are due for replacement. This has been a great help.

x check prices with batterymegastore

 

[NickRobinson]

What do you mea by "rebadged". Are they not genuine Numax or are Numax something else that has been rebadged? I have seen a very similar battery from Lucas, the LX31MF

http://www.ebay.co.uk/itm/12V-110AH...ne-Range-Motorhome-Caravan-Boat-/190918580386

Three year warranty and 'heavy duty'... battery warranties pretty flakey and have we ever heard of a 'light duty' battery?

Hee's another at #62 squids delivered (no connection)

 

[NickRobinson]

found it! Here is the one I bought last year, quick free delivery and still working well and its got a fiver cheaper too 110Ah at 58.00 !
http://www.ebay.co.uk/itm/Leisure-B...364?pt=LH_DefaultDomain_3&hash=item43bd39374c

 

[Plevier]

What do you mea by "rebadged". Are they not genuine Numax or are Numax something else that has been rebadged? I have seen a very similar battery from Lucas, the LX31MF

http://www.ebay.co.uk/itm/12V-110AH...ne-Range-Motorhome-Caravan-Boat-/190918580386

Lucas stopped producing batteries a long time ago. Manbat who own the Numax name are also the licensees of the Lucas name. I don't know who actually makes batteries for Numax/Lucas. I have no doubt the same batteries appear under other brands too.

 

[dulcibella]

Battery life depends very much on how much deep cycling they undergo. If you are set up with a smart charger, a 3-step or 4-step mains battery charger and an effective means of charging batteries while sailing, they can last for quite a while.