Hi there ! I want to know if I can change the battery for my thumb controller because it's only stay around 10 minutes ON ..

Hi, thanks for the inquiry. We're sorry that we don't recommend our valued customers to modify or repair their DJI Products as this would void the warranty of the DJI Products. For further information, please see the link below. We do appreciate your understanding.

https://www.dji.com/service/policy

I know, I don't warranty anymore anyway. And what should I do? Give another 200$ for a thumb controller?

So? nobody changed ever the battery?