Hi again

Sorry, I know I asked this question a couple years ago or a similiar one.

I am stumbled again and I don't want to ruin my batteries so I thought I
would ask the pros again.

I have two Marine deep cycle 750 A Nautaulis Canadian Tire Batteries.
225min/115 ah model number is 10-3199-0. These are the bit bigger
batteries about 40 lbs.

I also have the 10am/2am Automatic Canadian Tire 11-1567-0 battery charger.

I have had these batteries in my garage all winter and about once every
month or 50 days I would bring them up to full charge. Takes about 25 or 30
hours at 10 amp charging until that GREEN light comes on and automatically
shutting off.

My problem is now that the green light isn't coming on. They are just
sitting there bubbling away, I actually had to put about a litre or two into
each of Reverse Osmosis water in to them because I could see they were low.
But the green light will not come on and they keep charging. About 3 days
now.

I took both batteries down to Canadian Tire and the chap used a little hand
tool electronic device that pumped me out a receipt thing (EXP800) and this
battery test told me that the batteries are GOOD. Voltage is 12.63 for one
and the other was 12.68 for the other. They measured 922 CCA and 684 CCA
(both rated for 750A) so he said they are good. Temp was 19C


I asked him why the green light doesn't come on and the charging stop but he
said because the batteries are fully charged and good that the charger must
be good. And it is good because I used it on another deep cycle battery I
have and the green light came on and it stopped when fullly charged.

I see the needle is close to the green on the meter but just not moving over
and continues charging at 10 amps with the bigger batteries in question.

Batteries are almost 4 years old.

Any ideas or comments? Should I stop the charging? or continue until that
green light comes on like it used to? I would like to get a few more years
from these batteries . All coments are appreciated, cheap or otherwise, I
appreciate your expertise very much. Sorry the question is OFF Topic, but I
know you folks have the answer better than the boating groups. thnx

Best regards and thanks

73s