Battery terminology

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Across
  1. 2. the oldest batteries in the world commonly used this metal
  2. 5. the world's oldest battery was found here
  3. 6. very heavy battery and used in cars
  4. 10. allows ions to flow between sides of battery
  5. 11. electrons leave this side of the battery
  6. 12. mostly for electronics, fast charging and long life
  7. 13. the positive side into which electrons flow
Down
  1. 1. these batteries can reverse the flow of electrons
  2. 3. gaining of electrons
  3. 4. loss of electrons
  4. 7. most common battery, uses alkali metals
  5. 8. made of nickel and rechargeable
  6. 9. the type of elements that conduct electricity the best