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The lithium ion cell owes its dominance in new installations chiefly to its

  • A.tolerance of overcharge and over-discharge
  • B.ability to be stored indefinitely at full charge
  • C.high energy density and long cycle life
  • D.low cost per kilowatt hour of capacity

Answer: C

It stores several times the energy of lead acid for the same mass and survives thousands of cycles, which is what made portable electronics and electric vehicles possible. It is intolerant of abuse and needs a management system.

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