It takes about two hours for the realme Book to be fully charged from 0% to 100%. It is impossible to judge whether it is fully charged when it is turned off. When the charging indicator starts to light white, you can turn it on and look at the battery icon.
Description of charging port indicator:
The indicator turns off when the adapter is disconnected.
Shutdown state of charge:
-The battery power is less than 20%, and the white indicator light flashes once per second;
-The battery power is 20% ~ 90%, and the orange indicator light is on;
-Battery power > 90%, the white indicator light is on.