Across
- 3. Not logically valid in theory
- 4. Almost too easy to be true
- 6. Lasts longer than expected
- 9. Lower in comparison
- 10. Easy to see or notice
- 12. Totally redundant
- 13. Conducts electricity surprisingly well
- 14. Airtight and sealed
- 15. Of great importance
Down
- 1. Separated from heat transfer
- 2. Has enough power
- 5. Cannot be moved or changed
- 7. Powerful yet space saving
- 8. Extremely effective or productive
- 11. A serious error