80% battery consumption and 80% power consumption are two concepts.
Generally, the loss of the battery can only be detected with professional detection software; your battery display of 10% only means that you have used up about 90% of the battery, then you should charge it in time, otherwise the computer will automatically shut down if the battery is empty.
If the battery is depleted to 80%, the battery basically cannot hold any electricity. At this time, the computer basically depends on the charger to work. If there is a need for battery power work, the battery should be replaced in time.