Battery drain mi 9 SE Global rom 10.2.2

[lakdeuz]

Hello guys, new to this fantastic forum which made me decide to get a Xiaomi,

I recently got the Xiaomi mi 9 SE in global version, 10.2.2

Unfortunately the battery is extremely poor, I get like 1,5 hour SOT
even when screen off I lose a lot of battery,
I started the day a 100% and got to 12% at 1PM

when I check battery consumption I see that radio uses 51% of battery and android system 31%

do you have any idea on how to solve this issue?

there is no stable rom available atm for the mi 9 se to update

thank you guys