1. What is ROOT permission?
ROOT permission corresponds to super administrator in Windows system, which can modify system files of Android system. But there will be some risks if ROOT permission is powerful enough. Therefore, ROOT permission defaults to be closed and can be acquired if cracked.
2. How to acquire ROOT permission?
There is no official method of acquiring ROOT permission. You can find appropriate method via search engine(such as Google). DU Battery Saver prompts, acquiring ROOT permission may bring some risks because of differences among varying phones.
3. Why does DU Battery Saver acquire ROOT permission?
Please be assured that, DU Battery Saver acquires ROOT permission just to save more power from hardware. And, strict tests indicate that there will be no risks.