How do you know DualShock 4 is fully charged?

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Tags

1. #complete
2. #standby
3. #charging
4. #blinks
5. #takes
6. #controller
7. #approximately
8. #turns
9. #while
10. #slowly
11. #light
12. #remaining
13. #battery
14. #orange
15. #charge
16. #hours