Safety Instructions for Li-ion Battery Packs

  • To prevent personal injury or property damage, the following must be strictly observed and handled.
  • The degree of possible injury and damage owing to intended abuse, incorrect use or mishandling is described by the three levels of instructions (Danger! / Warning! / Caution! ) below.


  • Never use a DC power supply to charge the Li-ion battery pack! A DC power supply may overly charge the Li-ion battery pack, which may cause serious safety issues.
  • Ensure the correct polarity when connecting a Li-ion battery pack to a CC/CV (Constant Current / Constant Voltage) charger.
  • Never charge a Li-ion battery pack under inverse polarity!
  • Never leave a Li-ion battery pack unattended while connecting to a charger!
  • Never drop a Li-ion battery pack into water!
  • Never incinerate a Li-ion battery pack! Toxic material may burst or release to harm eyes and skins.
  • Never leave a Li-ion battery pack under the blazing sun or inside a car with closing windows! The long time overheated Li-ion battery pack may cause smoke or flame.
  • Never disassemble or shred a Li-ion battery pack! It may cause unexpected venting or explosion!
  • Never charge or discharge a Li-ion battery pack excessively!
  • Never short-circuit a Li-ion battery pack if you are not sure if the pack is made with a protection circuit module (PCM or PCB)! Handle with care when a Li-ion battery pack is made with flying leads.
  • Never shock a Li-ion battery pack with a heavy mechanical force.


  • Never connect a new Li-ion battery pack in series with anotherĀ old battery or battery pack, especially when the battery chemistry is different.
  • Never touch or handle a Li-ion battery pack if it is unusually hot, whether through continuous large current discharge or external heat.
  • Never remove or cut through the shrinking wrap insulation of a Li-ion battery pack.
  • Never over-discharge a Li-ion battery pack if its power output to drive a dedicated load is obviously failing.
  • Stop using a Li-ion battery pack if venting, excessive temperature or noise is detected.
  • Keep a Li-ion battery pack away from babies or children. Seeking a doctor treatment immediately if swallowed.
  • Do not allow the bursting liquid to contact eyes or skins in an event of venting! Wash the affected areas with large amount of water and then seek medical advice immediately.


  • Use a dedicated charger to charge your Li-ion battery pack. If no dedicated charger is available, a CC/CV (Constant Current / Constant Voltage) charger with proper voltage range shall be properly selected.
  • When using a Li-ion battery pack from a long term storage, charge the pack fully at 0.2C rate before using it. The pack can be fully activated after 2 ~ 3 deep cycles of charge and discharge.
  • Li-ion battery pack is not required to be fully discharged. You may charge your Li-ion battery at any time. After you fully activate your pack, avoid the deep cycles to lengthen the life of your Li-ion battery pack. However, two deep cycles of activation are suggested to apply every 3 months.
  • If the battery pack is getting hot after discharge, allow it to cool before charging it.
  • Unplug a Li-ion battery pack by holding its connector, in stead of pulling its wire.
  • Keep your Li-ion battery pack at ambient temperature around -10 ~ 25 degree C and maintain its SOC (State of Charge) about 40% ~ 50% for long term inventory.
  • When not using a Li-ion battery pack, disconnect it from the device.
  • Disposed Li-ion battery pack should be treated by officially authorized unit.
  • Battery packs with different chemistry should be separated when disposing them.