Samsung is slowly pushing out its security updates to address issues experienced after updating to one UI 4.0 android 12. Just received this update here in the UK, I should point out that some users already have this update.
Yes that's true... With the recent update I could confidently say the battery life on my S21 ultra has improved significantly. On optimised use its about 12/13 hours with on screen time of roughly about 8 plus hours. Still early days but hoping it improves more than this. On battery saving mode it's about 18 hours. It is exciting to say coming from someone that uses the exynos chipset version of the S21 series.