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  1.Q :What are the advantages of the polymer lithium ion battery? View answers
  A: 1.The voltage of single battery can reach 3.6~3.8V
    2.Large energy density.
     The energy density of the polymer lithium ion battery can reach 380~400 Wh/L.
    3.The long cycle life.
     The cycle life of polymer lithium ion battery can reach 500 cycles usually.
    4.Good safety, no pollution, no memory effect, no hazardous elements like Cd, Pb, Hg etc.
    5.Low self-discharge.

  2  Q :What are the Charge Limited Voltage, Nominal Voltage, Discharge Cut-off Voltage? View answers
  A: 1.Charge Limited Voltage
    It is the voltage when charge is changed from the constant current charge turns into the constant voltage charge.
    2.Nominal voltage
    It’s the approximation of the cell voltage.
    3.Discharge cut-off voltage
    It’s the voltage when the cell is discharged over.

  3  Q :What is the capacity of the lithium ion battery? View answers
  A: The battery’s capacity includes Rated capacity and Actual capacity. Rated capacity is the minimum capacity at the certain discharge condition. Actual capacity is the actual capacity when discharge at the certain condition which is mainly affected by temperature and discharge current. Its unit is mAh or Ah,(1Ah=1000mAh).

  4  Q :What’s the resistance of the polymer lithium ion battery? View answers
  A:It is the resistance when the electricity passes the battery. The big resistance can reduce the discharge voltage and short the discharge time. It is determined by the material, produce process, battery structure and so on. The resistance is an important parameter to evaluate the battery performance. The resistance should be tested by the special equipment but not multi-meter.
 
  5  Q :What is the self-discharge rate? View answers
  A: It is also called the capacity keeping ability. It means that the ability of keeping the capacity under the certain condition during open circuit. It is mainly affected by produce process, materials, storage conditions etc. Self-discharge rate is an important parameter to evaluate the battery performance.

  6  Q :What is the battery’s working voltage? View answers
  A:It is also called the outside voltage. It is the voltage difference between the anode and cathode of working battery. The polymer lithium ion battery’s working voltage is about 3.7V.

   7  Q :What caused the battery’s swelling and leakage ? View answers
  A: Because of the over charge, short circuit, self-discharge etc, the battery’s inner structure can be changed greatly, then it can cause battery swelling. The battery leakage is caused by mistake or Aluminum laminated film damaged.

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