Battery autonomy, please help meeeeeee

Hello Kindle Lovers!

This is my first thread here and I'd like to know the battery life of your Kindle.

I have the kindle Matcha 11th generation and with the wifi on it lasts a few days.

I use it every day for quite a few hours. Brightness on 7.

Any tips on how to improve? I try to keep it in airplane mode to consume less battery, but it lasts at least a week.

I contacted Amazon and they said it was supposed to last 6 weeks, but it never does.

Any tips?

What should I do?