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Generation 4-3 Pajero NW model 2011 - 2014

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  #11  
Old 1 Week Ago
drgtr drgtr is online now
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So this morning the car started fine. No hint of slowness of cranking

Tested battery before i started

It was on 12.54 volts


is this okay?
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  #12  
Old 6 Days Ago
gas55 gas55 is offline
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As usual Dicko1 is talking common sense.
We ask a lot of car batteries these days.
Especially with several stop-starts per day.
When you crank over a motor (especially a diesel), it's not far off a dead short to the battery. Then we load it up with heaps of accessories.
If I have had a couple of days of stop-start with the Child Bride in tow, I whack the battery on the charger over night, and I have had over 6 years out of some batteries. Of course if the motor is in good shape and starts quickly!
Greg
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  #13  
Old 6 Days Ago
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Dicko1 Dicko1 is online now
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Quote:
Originally Posted by drgtr View Post
So this morning the car started fine. No hint of slowness of cranking

Tested battery before i started

It was on 12.54 volts


is this okay?
12.7 is considered 100% charged. Your figure is showing about 85% charged capacity. Even though some wet cell batteries may show 12.8 or 13.1 volts....this is only a surface charge and normally takes between 12 and 24 hours to disappear and a truer reading.. My agm,s show 13.1 quite often...until something consumes some power on start up and they quickly settle down to 12.6/12.7. Agm,s fully charged at 12.7 as well....Each battery has 6 cells and these are normally 2.15 volts...so 6 x 2.15 =12.9..on a brand new, perfectly manufactured battery with top class internals you may get 12.9. 12.7 is the accepted figure for 100% charge..regardless if its showing higher figures.
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2014 NW with all the usual stuff plus more..
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  #14  
Old 4 Days Ago
drgtr drgtr is online now
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Thanks Dicko1

Been learning abit with some baseline data .

So tested my other car and neighbours two cars in the morning left overnight.

all of them show around 12.43 to 12.54. all crank perfectly so this voltage seems normal for overnight.

Now anything higher than 12.6 to 12.7 after a drive is surface charge. Which dissipates in an hour or two.

I been told by autoelectrician that morning voltage is totally normal and isnt really an indicator of anything unless its really low like 11 volts or more. Battery not holding charge or parasitic drain.

Naturally all batteries while cranking is above 10 volts.

Just to update. Shop has replaced this new battery under warranty and its been great for last 2 days so see how it goes.
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