What does the F mean on a car battery?

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Tags

1. #whilst
2. #alternating
3. #unlike
4. #appears
5. #supply
6. #straight
7. #means
8. #electricity
9. #known
10. #output
11. #direct
12. #electric
13. #battery
14. #provides
15. #closer
16. #power
17. #current
18. #household