Hello cmsrlabs,
the circuit on page no.3 is not for protect the battery from self discharge but for protection for deep discharge.
This circuit is powered by the battery and controlled the voltage.
Here is the circuit description:
The circuit consist of a comparator with OP1 and the switching stage with T5 and the relay Rel4.
The reference voltage is made by R14 and D8. OP2 is a impedance converter to get low resistance at the output. The reference voltage is 2,5V.
The voltage divider R9, P2 and R10 will give the switching point of the comperator. If the battery voltage is higher then 10,9V the comperator output is high and the relay is on. After the voltage drop under 10,9V the comperator output change to low and the relay goes off.
To adjust the switching point, connect a voltage of 10,9V to Point 5 and 6. Push the button shortly between point 9 and 10. If the relay switch on, turn P2 until the relay goes off, then a little bit back. push the button again. The relay must switch on and hold. Now reduce the voltage between 5 and 6 to 10,8V. The relay must switch off.
Now the circuit is adjusted. After charging the battery push the button to switch on the relay.
I hope the description is clear, else contact me again.
Regards
Rainer.
PS: If you can not adjust the circuit, reduce R9 to 33kΩ.