Hi Eric thanks for your input
I measured the battery voltage its 6.5V.
Now I get the charging current 150mA.I adjusted the charger voltage to 6.8V.
So still there 0.3 V voltage gap.
My battery there’s no discharge voltage or current given.
A 6V SLA discharged voltage is 5.4Vmin.
A 6R load resistor [10Watt] should discharge the battery in 3 to 4 hours.
[a 6V 6W car lamp is a good way to discharge the battery]
DONT allow the SLA to go below 5.4V!
Any how I’m going to discharge & see what’s the progress.
Thanks a lot