The 150 series Dual Battery Guide

[AJ120 Out of control poster! Find all posts View Profile Close AJ120]

Could still have no capacity. That could be a surface charge, only way to tell is with a hydrometer.

How do you use a hydrometer on a sealed battery?

Cheers Andrew

[Symo Advanced Member Find all posts View Profile Close Symo]

How do you use a hydrometer on a sealed battery?

Cheers Andrew

Hahaha, of course my bad, was thinking it was a maintenance wet cell. *face palm*

Still, until it's loaded no way to check if it hold current.

[craigm Addicted PP Member Find all posts View Profile Close craigm]

Might put the ARB fridge on it for a couple of hours then ....

[mjrandom Out of control poster! Find all posts View Profile Close mjrandom]

Craig you could probably get it load tested where you bought it?

[craigm Addicted PP Member Find all posts View Profile Close craigm]

Most likely could mjr. Just cant get the time to get it in there at present. Back from a lengthy holiday and got lots of work to catch up on...

[drivesafe Senior Member Find all posts View Profile Close drivesafe]

Voltage 1hr after disconnecting Batt charger - 12.89V -
Voltage 9hr after disconnecting Batt Charger - 12.79V

(Battery not in car so 0 load on battery)

Hi Craig and with any other type of battery, that voltage reading would indicate a fully charged battery.

While you have given the Optima a good charge, at 12.79v, being an Optima Yellowtop, the fully charged OPEN CIRCUIT voltage is 13.1v.

Still sounds like the battery is good, just give it a bit longer on the charger, and see what you get.

[Isiman Junior Member Find all posts View Profile Close Isiman]

ok, two quick questions:
due to the lack of space for 2x N70 sized batteries under the bonnet, would a Optima yellow top (as starter) and Century Marine Pro 730 (as secondary for fridge) need a DCDC charger such as the Redarc BCDC 1225 OR just use the diode trick and a basic sbi isolator?

Second question:
what type of batterys are the following (ie, wet cell/calcium etc)
Marine pro 730
'normal' century 4wd starter motor
optima yellow top

Thank you, sorry for ignorance

[Guest Close Guest]

just use the diode trick and a basic sbi isolator?

This.

[LeighW Avid PP Poster! Find all posts View Profile Close LeighW]

All batteries these days are calcium hybrids, generally calcium these days refers
to a full calcium battery.

Marine Pro is a wet cell but use AGM mode on a charger.

Century 4WD again wet cell but use AGM

Optima AGM, could use wet cell mode on a charger as these have a higher terminal voltage but I would use AGM

Most modern batteries charge at lower voltages and don't like the wet cell setting on chargers.

[Isiman Junior Member Find all posts View Profile Close Isiman]

Awsome, thanks to both LeighW and amts!

[MelbournePark Member Find all posts View Profile Close MelbournePark]

ok, two quick questions:
due to the lack of space for 2x N70 sized batteries under the bonnet, would a Optima yellow top (as starter) and Century Marine Pro 730 (as secondary for fridge) need a DCDC charger such as the Redarc BCDC 1225 OR just use the diode trick and a basic sbi isolator?

Second question:
what type of batterys are the following (ie, wet cell/calcium etc)
Marine pro 730
'normal' century 4wd starter motor
optima yellow top

Thank you, sorry for ignorance

I will answer but no time at the moment.
Before i do can you also list the actual century battery model?

[Isiman Junior Member Find all posts View Profile Close Isiman]

It's a N70ZZL4WD.

I will take a picture of my charger as it has 3x different battery types, and 3x different voltage settings on it - actually, no I wont as pictures on this forum seem to be really sucky (ie, they only display a link to the image). I will do it the old fashion way and type out what I see!

[drivesafe Senior Member Find all posts View Profile Close drivesafe]

Hi Isiman and first off, why not just fit two Optima Yellowtop batteries.

This would give you two high current ( fast ) charging batteries, and you most certainly wouldn’t need a DC/DC charger.

Next, no need for pictures of your charge, just post up the make and model of your battery charger and we can Google for the manual for your specific charger.

[Isiman Junior Member Find all posts View Profile Close Isiman]

I already have a marine pro as well as the other n70 (which is unfortunately useless in the prado - not having enough space for 2x n70s) taken out of my Patrol before it left my hands - took all the good bits out before it 'went'. If I don't need to buy two new batteries then that is a good thing however when the Marine Pro does die, then I might consider getting a second yellow top.
I would be looking at using the yellow top as the starter and running accessories of the marine.
The marine pro is only about 4 months old.
I'll have a look at lunch time for the model of the charger.

[Isiman Junior Member Find all posts View Profile Close Isiman]

The charger is a electro bc-1215.
I havethe following options
gel, wet, calcium
and 13.2, 13.5, 13.8