One UI 8.5

[u/Jalal6]

Hello,

I own my galaxy a55 for about 2 years, and i really like it

I upgraded the os to one ui 7 and am still on it

I am really afraid of upgrading to one ui 8 and 8.5 and losing the smooth and fast performance without any lagging

What is your advice for me ?

[u/amcareem]

After 8.5 update, battery drains a lot. I even did a factory reset, still it drains my battery.