Suddenly, he saw it. On the schematic, a tiny resistor labeled was marked as a critical gatekeeper for the backlight power

This shows how the battery voltage (3.7V-4.4V) converts to different rails:

Schematic Redmi 13c Extra Quality Fix Info

Suddenly, he saw it. On the schematic, a tiny resistor labeled was marked as a critical gatekeeper for the backlight power

This shows how the battery voltage (3.7V-4.4V) converts to different rails: schematic redmi 13c extra quality