It is solved. Supplying it through battery is OK, supplying it from +5V Vusb pin causes 4mA consumption.
I am already working on my application.
Good for you.
The on-board battery charge controller consumes a lot of current when powered from the 5V pin or USB connector.
Looks like, yes, still, can’t fathom how that chip managed to consume 4mA. Yet here we are, Thanks for idea!
According to the datasheet, the current consumption of the charge controller BQ25100 is 0.75mA.
There may be other causes for the 4 mA.
edit
When the battery is not connected, the charging terminal falls below 4.2V, so the BQ25100 attempts to charge the battery until it reaches 4.2V. The operating current at this time would be about 4 mA.
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