Battery FAQ

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  Warnings
  To prevent a possibility of the battery from leaking, heating or explosion please observe the following precautions:
        1)  Do not immerse the battery in water or seawater, and keep the battery in a cool dry surrounding if it stands by.
        2)  Do not use or leave the battery near a heat source as fire or heater
        3)  When recharging, use the battery charger specifically for that purpose
        4)  Do not reverse the positive ( + ) and negative ( - ) terminals
        5)  Do not connect the battery to an electrical outlet
        6)  Do not discard the battery in fire or heat it
        7)  Do not short-circuit the battery by directly connecting the positive ( + ) and negative ( - ) terminal with metal objects such as
              wire.
        8)  Do not transport or store the battery together with metal objects such as necklaces, hairpins etc.
        9)  Do not strike or throw the battery
        10)  Do not directly solder the battery and pierce the battery with a nail or other incisive object.


  Cautions
  1)  Do not use or leave the battery at very high temperature ( for example, at strong direct sunlight or in a vehicle in extremely hot
              weather ). Otherwise, it can overheat or fire or its performance will be degenerated and its service life will be decreased.
        2)  Do not use it in a location where static electricity is great, otherwise, the safety devices may be damaged, causing hidden
              trouble of safety.
        3)  If the battery leaks, and the electrolyte get into the eyes. Do not rub eyes, instead, rinse the eyes with clean running water, and
              immediately seek medical attention. Otherwise, it may injure eyes or cause a loss of sight.
        4)  If the battery gives off an odor, generates heat, becomes discolored or deformed, or in any way appear abnormal during use,
              recharging or storage, immediately remove it from the device or battery charger and stop using it.
        5)  In case the battery terminals are dirt, clean the terminals with a dry cloth before use. Otherwise power failure or charge failure
              may occur due to the poor connection with the instrument.
        6)  Be aware discarded batteries may cause fire, tape the battery terminals to insulate them.


  What is the primary battery and secondary battery?
  The primary battery refers to the battery that can only discharge and is not rechargeable. The secondary battery refers to the
        rechargeable battery that can be charged and used in duty-circle operation.


  What is the cycle life of rechargeable battery?
  When a battery experiences a charge and discharge, we call a cycle or a period. In the stated charge and discharge principles and
        the capacity decline before a stated standard, the total cycles it can undergo called rechargeable battery cycle life.


  What are the possible reasons for the rechargeable battery service life reduction?
  1)  Charger or charging circuit is not matching to the battery type. 
        2)  Over charge and over discharge. 
        3)  Battery type is not matching to the appliance.


  What are the possible reasons if the rechargeable battery or rechargeable battery pack can not be charged?
  1)  The battery is zero voltage or there is battery with zero voltage in the battery pack. 
        2)  There is wrong connection inside the battery pack. 
        3)  There is abnormity of electronic components and/or PCB inside the battery pack. 
        4)  Failure in charger. 
        5)  Outer element causes the charging efficiency to be too low, such as extremely low or high temperature.


  What will happen if the batteries with different capacity are packed together?
  If the batteries with different capacity or new and old batteries are used together, leakage, zero voltage and so on might happen. If
        the battery are rechargeable and are being charged, some batteries is overcharged and other batteries is not in full charged state.
        During the discharge, some batteries can not discharge fully and other batteries might over discharge. This way, the battery will
        be damaged.


  How to activate a cell which has not been used for a long time?
  A new cell is normally be adjusted at half-charge condition for reducing the risk during the transportation, but when storage for a
        long period, the cell need to be activated for better performance: Cut off the power of device then deeply discharge ( use your
        device ) , and then charge it until the full light on the charge is on, extra 1~3 hours charging is better.


Some misunderstanding about lithium ion battery

  1)  The higher discharge voltage platform the better?
  Normally the discharge voltage platform ( DVP ) is defined as the discharge time when the cell's voltage down to 3.6V at 1C
        current.There are lots of factors to make the DVP different such as temperature, capacity, cell tructure, separator, electrolyte….etc,
        some cell maker use raw material with smaller particle size or thinner separator to achieve higher DVP, but, in the meantime they
        always sacrifice the safety characteristic of cell.
  2)  The lower impedance the better cell?
  You can not judge cell only by its impedance cause impedance is only the summary of the whole “cell circuit” which including the
        material, welding…, nomally, it do not mean anything.
  3)  The capacity higher the better?
  The same reason as above, some cell maker sacrifice the safety characteristic of cell to achieve higher capacity, it's not
        responsible, so, normally, a particular capacity mean unsteable.
  4)  It's better to charge the cell while it's exhausted
  We recommend the best charge time is about 70% discharge which may prolong cell's life.


  What is a short circuit?
  If the positive and negative terminals of a battery come into contact with each other or with a conductive metallic object, this can
        cause a short circuit, which generates heat. If cells or batteries are stacked on top of each other or mixed, the resulting short
        circuit can lead to heat generation, leakage, rupture, and possibly fire.


  May I charge Primary Lithium batteries?
  When a Primary Lithium battery is charged, gas is generated inside the battery and can result in swelling, heat generation,
        leakage bursting and fire.


  Can I force-discharge lithium batteries?
  When batteries are force-discharged with an external power source, the voltage drops to under 0 volts ( which is called voltage
        reversal ) and internal gas is generated. This can lead to swelling, heat generation, leakage, rupture or fire.


  Can I use Lithium batteries mixing with other battery types?
  If different types of batteries are used together, or new batteries are used with old ones, the difference in characteristics of voltage,
        capacity, etc., may cause over-discharge of the battery which is exhausted first, leading to swelling, bursting or fire.


  Where should lithium batteries be stored?
  Lithium batteries should be stored in a cool, dry place that is not exposed to direct sunlight and has minimal temperature
        variation. Storage in areas subject to high temperature or humidity may cause deterioration in battery quality and durability. To
        avoid short circuiting batteries during storage, be sure that the positive and negative terminals do not come into contact with each
        other.


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