After assembling of the circuit, adjust TR1 to null value, power-up and make the following adjustments :-
 Without connecting the battery check that the 2 LED?s are turned on.
 Connect a car battery to the circuit and check that LD2 is OFF and a current (normally 2A to 4A) is flowing to the battery.
 Adjust TR1 until LD2 turns ON and the charge current is cut.
 Adjust TR1 to null value and charge the battery using the hydrometer technique (if you do not have or do not know how to use a hydrometer, then use a good condition battery and charge).