Hello,
Here is Shift Register schema, the brend is Nexperia.

SYL

Hello,
As I was saying five days ago,
"I measured USB current with the program "Factory test" and a serial USB device named "UT25".
The value is 131 mA, without interraction."
Since then, I have measured the current according to the different programs :

The cause of this excess consumption is IT8951.
An alternative to this component is the 74HC4094D, 8-stage shift-and-store bus register, used as IO extander.
A competitor with the same display consumes 65 mA, i measured to.
SYL

Hello,
If you want to measure RTC and zener D11 current, i indicate the PCB resistors positions

SYL

Hello,
On mine, the maxi level indicator of charge is 86% corresponding to 4.18V
I measured USB current with the program "Factory test" and a serial USB device named "UT25".
The value is 131 mA, without interraction.
I also wrote personal comments about all GPIOs (in french, my native language):

All GPIOs are represented (except non-existent ones : 20, 24, 28, 29, 30, 31)
SYL

Hello,
I completed the schema with VUSB_IN, VSYS and OR fonction with D9,D12

SYL

Hello,

If the repository is facing the wheel,

"code source" is true, "SCH-name" is false

SYL

Hello,

i also made a fisrst compact schema to facilitate understanding

SYL

Hello @tatar-andrei,

With a supply of 4.2V, U(R35)=11mV, equivalent to 1.1µA for RTC and zener D11current.

Equivalence names table

There is inversion between Left and Right, why not having simply called the buttons Top and Bottom?

SYL

Hello @tatar-andrei,
I am also going to use a power supply to continue analyzing the consumption of the various components because IT consumes a lot.
Can we turn it off with a mos then turn it on again?
Will it be able to reset itself without the ESP32 sending it an initialization sequence?
I will study this ...
SYL