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  What is a battery?
  What is the difference between primary and secondary battery?
  What is IEC?
  What is the electrochemistry principle of Li-ion battery?
  How many battery package materials are frequently used?
  What are the marking approaches of rechargeable batteries?
  What are the marks and its meanings of Li-ion battery packages?
  What are the main compositions of Li-ion battery?
  How long can a cell be stored?
  What is the best condition for cells store?
  What are possibly the reasons cause cells or battery packages unchargeable?
  What are the advantages and disadvantages of rechargeable battery?
  What are the advantages of Li-ion battery?
  Why are lithium batteries particularly suited for cameras?
  What is the objective to pack and assemble cells?
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