Redmi 8A Does not come with fingerprint Scanner it has Face unlock support which works well under good lighting conditions, does not work in low light. Check out the video below on how to set up face unlock.
Redmi 8A has 5000mAh battery which is able to deliver more than 2 days of battery life, In our battery test we got 12 hours of screen on time, performance is decent for not gaming.
Redmi 8A has support for 18W fast charging, Box charger is 10W
Charging Time with 18W charger