Why does Android system use so much battery?

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Tags

1. #drain
2. #things
3. #google
4. #buggy
5. #aware
6. #where
7. #happen
8. #space
9. #system
10. #update
11. #behaviour
12. #services
13. #result
14. #cache
15. #android
16. #settings
17. #might
18. #however
19. #manage
20. #battery
21. #storage
22. #clear