Lead Acid Battery Charger Circuit Automatic Cut Off

In the previous video I made a lead acid battery charger circuit with adjust current and voltage stabilizer, in this video I will combine it with a circuit that automatically shuts off when the lead acid battery is fully charged. Simple circuit using only 1 Relay, 1 BJT, resistor, diode and 2 LEDs.
Note to everyone, must connect the battery to the circuit first, then power on later, then the new circuit will work. This is also the principle of operation of the circuit.
Schematic please download at here
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