About the notification of Android System

[DuongPham]

Hey everyone

Yesterday i had updated my X performance from android 7.1.1 to 8.0

Everything is ok except this:

I installed AccuBattery and it runs in the background 

So there is a notification of Android System about this, and i can't make the notification disappear, except i stop the app Accubattery, 

I want to still use this app but the notification annoy me so much

So please help me, thanks !!!!