I charged my batteries till 6o'clock last night said fully charged this morning now 14 hours later they all read 12.58 to 12.62 a ll 3 of them is that considered fully charge??? or could it be my multi meter that is off ????
I charged my batteries till 6o'clock last night said fully charged this morning now 14 hours later they all read 12.58 to 12.62 a ll 3 of them is that considered fully charge??? or could it be my multi meter that is off ????
1990 374V Ranger Still kickin' bass after all these years
Those numbers are a little low. Anything hooked to the batteries? What charger?
If you have integrity, nothing else matters. If you don't have integrity,
nothing else matters.
3 differnet stand alone chargers nothing hooked that is drawing that I know of
What did they read after charging to get a starting point?
Yes, 12.6 volts is a proper resting voltage for most wet cell lead acid batts. Immediately after charging you would get a higher voltage reading, but they should float down to 12.6 ish volts when they rest.
John Walker - Matthews NC
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Yes, 12.6-12.8 after resting so you’re on the low end of normal
There is no range. There are batteries fully charged at 12.65V. These are not fully charged at 12.64V. There are batteries that are fully charged at 12.72V. These are not fully charged at 12.71V. Any voltage below the design full charge voltage indicates a problem.Originally Posted by BDBR
If you have integrity, nothing else matters. If you don't have integrity,
nothing else matters.
How do you know what it is suppose to be fully charged where would I find that info
There are really only two electrolyte densities commonly used in consumer available conventional lead-acid batteries. Trojan batteries are 12.72V, all others commonly available are 12.65V.
If you have integrity, nothing else matters. If you don't have integrity,
nothing else matters.
So 12.60 wouldn’t be too bad for a battery that is 3 seasons old
It’s bad regardless of age. Normally even an old battery will at least reach full voltage, though capacity is reduced. Good chance the charger isn’t doing the job. Measure your vehicle battery with the same meter and see what you get.
If you have integrity, nothing else matters. If you don't have integrity,
nothing else matters.
I measured my friends boat who uses an on board charger his measured about the same with my meter
For what it is worth, I spoke to a good friend I've know for decades, who happens to be a mechanic. He said after 14-hours that is not an unusual reading. You could always take the battery to your local AutoZone or O'rielly's and have it tested.
What type batteries and what brand? Also, what type charger are you using? Do yourself a favor. Go to Harbor Freight and buy a Load Tester! Worth it over removing your batteries and taking them to be tested.
Another vote for the load tester from Harbor Freight. I have had that one for years and it does a great job.
CatFanThere is no range. There are batteries fully charged at 12.65V. These are not fully charged at 12.64V. There are batteries that are fully charged at 12.72V. These are not fully charged at 12.71V. Any voltage below the design full charge voltage indicates a problem.
Agreeing on a charger that is charging properly, would a wet cell battery that would only charge to 12.64 indicate a weak but functioning cell(s)?
Are those voltages the same for AGM batteries or do they have different voltage expectations.There are really only two electrolyte densities commonly used in consumer available conventional lead-acid batteries. Trojan batteries are 12.72V, all others commonly available are 12.65V.
The reason I ask is the similarities (lead acid) of wet cell vs AGM, but have seen various charge/voltage charts and they sometimes disagree.
Thanks
AGMs have higher OCV. 12.8 to 13.2V. Optima are the higher voltages.
Reduced OCV of a charged battery would indicate a chemistry change in the battery. Not a good thing.
If you have integrity, nothing else matters. If you don't have integrity,
nothing else matters.
Thanks CatFan
And thanks to twitch for your post as I have learned something today.
I learned we share something other than the love of fishing and that is, spending money on boat maintenance!
Out of curiosity I checked mine this evening. They were charged overnight from Saturday to Sunday and my dual pro (2009 era) charger was unplugged Sunday morning. My group 31 interstate agm cranking battery was 12.71, the everstart group 29 wet cell deep cycles were 12.84 (09/16 date code). Obviously the deep cycles are old but unfortunately they weren't used much and kept charged since install. I could tell they were getting tired after 5 hours fishing in the wind Saturday. Based on comments above, seems high ��
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