Instructions on how to root cm xl plus using kingroot (or SU).
1. Install latest kingroot.
2. Root phone until 100% completed.
3. Tap on kingroot menu (3 dots at the upper right).
4. Disable root authorization.
5. Go to phone settings > apps >all apps. .
6. Look and tap on battery settings and disable.
7. Go back to kingroot menu and enable root authorization.
8. Restart phone.