# 6v battery low voltage cut-off circuit

I have a circuit that draw 150 ma and i use 6V/4Ah dry cell to supply. Voltage regulator of this circuit needs minimum 8V so I use boost converter to draw the battery voltage to 8 volts.This converter works up to 2 volt.

I would like to stop this module when battery goes below 4-5 volt. I tried this circuit with converter.

It worked but when i connect the converter to system the input voltage of the converter is decrease and converter is not work even battery at 6V. I would like to learn why this circuit not worked and what can i do to work this circuit for cut off the voltage under 4-5 volt.

• Where exactly is your second circuit connected to the first? Where is the input and the output? Nov 6, 2019 at 16:46
• You should also tell us why you think the second circuit should cut off the voltage under 4-5 volt. (The second circuit makes no sense to me) Nov 6, 2019 at 17:20
• @Aaron second circuit is connected to input of the input of the converter. (IN+) Nov 6, 2019 at 17:43
• @StefanWyss when voltage level goes under to 2V converter stop the convert. I thought if i drop the input of the converter to 2v converter stop work so add that circuit between battery and boost converter but my thought is failed. Nov 6, 2019 at 17:49