Battery CCA and Amp Hr issue.

[Robo]

Looking at replacing the old battery.
According to manual Std TB42 battery is 50 amp hr with option 60 amp hr.
Fairly sure aftermarket listing are way larger, but these near rub the bonnet through the sound det panel.
think these are more like 120amp hr, or 720 CCA.
80 amp hr is for diesel so I cant see the point of going this large for petrol.
so what is really needed for 4.2 petrol ?
or am I wrong?.
whats the go people?.

[MudRunnerTD]

Generally people try and get the biggest battery rating you can fit late if you want to run a few accessories??

I run matching 110amp/hour 750CCA batteries in the GQ

You will fit an N70 size battery in your tray no dramas. Buy the highest output you can in that size mate..

Cheers MR

[threedogs]

X2 with above CCA is the ability to start your motor so bigger is better also good for winch duties.
AH is mainly on a deep cycle battery, most use as an AUX battery to run accessories. N70 is the size you want
I think a 320 mm casing from memory. 100_110 AH deep cycle is plenty for most 4x4ers.
there are larger batteries available, but these would be for serious expeditions with solar applications

[Robo]

Yep, deep cycle is more suited as a 2nd battery and not so for cranking.
As the plates are thicker and dont give off amps as readily for cranking and more likely to recover better if drained to low.
"I do understand this is 1 time that larger maybe better !! ".
But I was wondering if anybody was running something like nissan fitted standard 50-60 ah,and how they rated
I was thinking more like 80-100 AGM battery and hopefully better under bonnet clearance.
AGM are more expensive but I've had a good run with em in the past.
I cant see me fitting a winch as something I will be doing.
Hid spotties, decent cd/radio and may be vhf/uhf but that's about it for the near foreseeable future.
just after some feed back to know if lower CCA , AH is going to cut it ?.
Or was Mr Nissan only dreaming when he suggested 50-60 amp hr.
Cheers

[threedogs]

You'd have to think Mr Nissan put the smallest battery possible in for cost, so bigger wouldn't hurt. 4x4 will start with a D/C, but I wouldn't run one all the time , Thats not its job. As for size if it says N70 it'll fit under the bonnet

[Winnie]

My GQ fit an N70ZZ no problem.

Tappa tappa

[Robo]

Thanks everybody.
Currently have N70 size battery.
This is rubbing the under bonnet sound det panel.
Yes, Battery size from factory is a compromise, ( hence subtle hint earlier ).
Seen the out come of under bonnet fires from bats making contact with metal a few times over the yrs now.
Not pretty, and rather expensive to repair.

90ah is the boarder for calculating ( by the rule of thumb ) cca from ah.
600< CCA, 1 Ah = approx 5 CCA.
601> CCA, 1 Ah = approx 6-7 CCA.
eg, 80x7= 560 CCA.
but 90x7 = 630 CCA, so this can swing either way purely but the calc.
Been quoted 720 CCA for N70, and that = x 5 CCA for the calc
It all depends on the number of plates per cell and thickness of plates for cca, so this is 1 of the reasons I put the feelers out aswell.
It's proberly a bit tricky and 1 reason why manufactures just quote as large as they can fit under bonnet.
Don't get me wrong I accept std is small for size engine and potential usage.
TB42std.
50ah = approx 350 CCA.
option TB42
60ah = 420 CCA.
TD42 std
80= approx 560 CCA.
N70 can vary by manufacturer 490-720 CCA so it's the quality that adds up.
This low 490 CCA is supacheap auto's 4x4 marine effort.
And this is a cheap battery with less plates so CCA will be down, built to a price.
Needs attention so others dont get caught thinking they are all the similar CCA.
(and if you run dual bats, well make sure they match up brand, model, cca ah or charging/reliability could become an issue).
I think going 80+ amp hr "quality battery" will cut it for our needs.
Just putting the feelers out on what's out there.
Thanks again.
cheers.

[nissannewby]

Hey mate get onto your nearest CAT dealer and grab a catalogue for there batteries. They have slightly different sizes (which may suit your requirements) inc the standard sizes, maintennance free, tough rugged batteries and are really well priced. I bought the largest battery they do to run my fridge, it weighs 60kg just by itself, has nearly 1600CCA and will run the fridge for 2 weeks without a charge. This cost me $380

[Robo]

Hey mate get onto your nearest CAT dealer and grab a catalogue for there batteries. They have slightly different sizes (which may suit your requirements) inc the standard sizes, maintennance free, tough rugged batteries and are really well priced. I bought the largest battery they do to run my fridge, it weighs 60kg just by itself, has nearly 1600CCA and will run the fridge for 2 weeks without a charge. This cost me $380

Thanks, that's a good price for such a large battery and being cat it should be a solid construction to handle vibration to boot.
Will have a look.
Cheers

[nissannewby]

Yeah the construction is pretty good you will get 2 years out of them easily running in a D11 dozer and they aint smooth.