After Oneui 5.1 installed battery draining issue I faced. batterydraining so fast

Recently February security patch update comes in galaxy A52S 5G. I try to update my device but after download it's showing me " failed to update firmware "Please helpmeabout this issue. I try to reset my device, wipe cache partition and reset devic...

After oneui 5.0 QR scanner not working properly I hard try focus but it's not working. Kindly fix this issue