12V 60A car battery , maybe dead?

[Richdes]

My batteries aren't very sulphated they can take charge until 13.7v when the battery charger stop charging the batteries go slowly down to 12.9 v but I know that are sulfated cause they cant hold much time my scooter autonomy has been reduced to less than a half There not shorted cells cause I have a load 100 ah battery tester and the batteries pass the test every battery is ok I guess don't you think so?

        Thanks a lot again

[Richdes]

 Excuse me Just the last question I forget to ask you this: In your experience do you think that they can recover his ah/hour power again the internal resistence are not higth on full charge is 10mohm ,11mohm,12mohm no more and the battery manual say 6mohm when where new
       Thank you

[Groundloop]

My batteries aren't very sulphated they can take charge until 13.7v when the battery charger stop charging the batteries go slowly down to 12.9 v but I know that are sulfated cause they cant hold much time my scooter autonomy has been reduced to less than a half There not shorted cells cause I have a load 100 ah battery tester and the batteries pass the test every battery is ok I guess don't you think so?

        Thanks a lot again

Richdes,

My best guess is that your batteries will improve on each cycle charged by the circuit.
After your drive, when the batteries is low on charge, use the circuit until the voltage
on each of your five batteries is above 12 volt. Then top charge the batteries on your
regular charger. Run your bike until the batteries is low again, and repeat. After just
a few charge/discharge cycles you will see a improvement in your batteries. Repeat
the cycles until you can't see any more improvements. Then after a few regular charge
and discharge cycles, use the circuit again.

GL.

[Groundloop]

Excuse me Just the last question I forget to ask you this: In your experience do you think that they can recover his ah/hour power again the internal resistence are not higth on full charge is 10mohm ,11mohm,12mohm no more and the battery manual say 6mohm when where new
       Thank you

Richdes,

Yes, that is the point of a desulphator circuit. The internal resistance in the batteries will go
down when the lead plates is cleaner. The batteries will go up in amp/hour capacity for each
discharge/charge cycle.

GL.

[Richdes]

Thans a lot I m just waiting for the diodes to start.