Lithium Li-ion 18650 3.7V 4.2V Battery Charger Board DC-DC Step Up Boost Module TP4056
as sold this Module see image
has anyone added a soft latch power switch circuit to this particular USB battery board DC-DC step Up boost module?
if so? can we see your reverse engineering work of this particular boost module?
why
so we can have an auto power off at low Battery & a soft latch power switch for the step Up boost part of the circuit.
the idea here is to have a single Li-ion 18650 with USB Charger and power 50 to 200Ma 6 to 9 volt projects
boilerplate USB battery power supply circuit for 6 to 12 volt projects with its own soft latch power switch .
I have seen and know about soft latch power switch circuits, Dave did a video on them.
so how would you go about modifying this particular USB battery board DC-DC step Up boost module?
I would cut in to the power rail tracks on the PCB in between the TP4056 battery charge part of the circuit A
and the DC-DC step Up boost part B of the on the PCB and add a power MOSFET & two npn in a soft latch.
but the part I do not know, is the best way to trip off any modified soft latch circuit when the battery gets low.
so if any of you have reverse engineered this module?

can pin 8 on the TP4056 be used as an On Off switch? so no auxiliary power MOSFET is needed simplifying a soft latch power switch.
my USB TP4056 boost modules are still in the post & no one online has reverse engineered the circuit as far as I know.