Which is better NiMH or lithium ion?

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Tags

1. #charge
2. #density
3. #lighter
4. #higher
5. #deliver
6. #energy
7. #cells
8. #voltage
9. #compared
10. #output
11. #smaller
12. #batteries
13. #single
14. #while
15. #carries
16. #battery
17. #means
18. #small