SlowlyButSurely
Well-Known Member
It's the Numax Marine M110 I'm interested in. 110Ah dual purpose batteries with 2 year warranty. They seem to be available at a reasonable price. Has anyone tried them?
Numax Marine Batteries Anyone?
- Thread starter SlowlyButSurely
- Start date
Ruffles
Well-Known Member
Bought one this year. Starts the engine ok. Too soon to judge anything else I'm afraid!
Having said that it has a good carrying handle. More than can be said for the Delphi it replaced.
Having said that it has a good carrying handle. More than can be said for the Delphi it replaced.
JimC
Well-Known Member
I've had the 110 ampere hour Numax in my boat for the past 3 years and it's just about ready for replacement. I find 3 years is about all I get from any deep cycle battery regardless of maker. Th Numax has been at least as good as any other make I've used and better than some. Cannot answer on its engine starting ability as I have a separate battery for that.
charles_reed
Well-Known Member
The Battery Con game and a rant about Blind led by near-blind
Don't know about Numax, specifically, but so-called deep-cycle batteries are little different to auto batteries and with similar life cycles - about 250.
Construction and composition of the battery plates is the important factor.
Most batteries have thin (0.7mm) plates, giving high surface area and big short term outputs, so-called heavy-duty thicker plates (0.9mm) and lower currents.
Higher antimony - greater mechanical resistance, higher self-discharge, easily ruined by being over-discharged.
Calcium - lower self discharge, slower charge and lower outputs
If you want longevity you need to go for batteries with thick, heavy plates, such as industrial or traction batteries which are good for about 1500 cycles.
These always lose water on charging - which rules out any batteries described as "maintenance free". Gel-filled batteries and starved mat batteries are alternatives to wet-cell with major drawbacks for their advantages.
The problem lies in the apocryphal claims made for various makes/construction of batteries by self-interested marketers, further confusing a pretty complex picture.
Don't know about Numax, specifically, but so-called deep-cycle batteries are little different to auto batteries and with similar life cycles - about 250.
Construction and composition of the battery plates is the important factor.
Most batteries have thin (0.7mm) plates, giving high surface area and big short term outputs, so-called heavy-duty thicker plates (0.9mm) and lower currents.
Higher antimony - greater mechanical resistance, higher self-discharge, easily ruined by being over-discharged.
Calcium - lower self discharge, slower charge and lower outputs
If you want longevity you need to go for batteries with thick, heavy plates, such as industrial or traction batteries which are good for about 1500 cycles.
These always lose water on charging - which rules out any batteries described as "maintenance free". Gel-filled batteries and starved mat batteries are alternatives to wet-cell with major drawbacks for their advantages.
The problem lies in the apocryphal claims made for various makes/construction of batteries by self-interested marketers, further confusing a pretty complex picture.
JerryHawkins
Well-Known Member
I got four CXV31MF (113Ah sealed) with dual terminals. Not sure the sealed and dual terminals are worth the price premium, but still a "cheap" battery. Only had them a couple of years so far. The fact that they are sealed limits my charging a little.
I maintain that a cheap battery charged with an expensive (read good quality multi-stage) charger will last longer that an expensive battery charged with a cheap (read Halfrauds car-type) charger.
With any lead-acid battery, charging is the key to getting long life and good performance. Always fully charge and never discharge below 50% (unless in an emergency). Keep it fully charged.
I maintain that a cheap battery charged with an expensive (read good quality multi-stage) charger will last longer that an expensive battery charged with a cheap (read Halfrauds car-type) charger.
With any lead-acid battery, charging is the key to getting long life and good performance. Always fully charge and never discharge below 50% (unless in an emergency). Keep it fully charged.