As a reputable li-polymer battery manufacturer, we understand the complexities and concerns involved in shipping Li-polymer batteries, whether assembled in devices or shipped alongside them. We write this article to provide comprehensive guidelines on how to safely and legally ship Li-polymer batteries by sea, adhering to international shipping regulations.

General Packing Requirements

For Assembled Batteries:

  • Secure Mounting: Ensure batteries are securely mounted within the device and protected against movement or damage.
  • Device Switch Off: Devices should be completely switched off, and measures should be taken to prevent unintentional activation during transit.

For Batteries Not Assembled in Devices:

  • Individual Protection: Each li-polymer battery should be individually packed to prevent short circuits (e.g., by covering exposed terminals).
  • Rigid Packaging: Use sturdy, rigid packaging to avoid crushing or pressure on the batteries.
  • Separation: Batteries must not come into contact with each other or with conductive materials that could cause short circuits.

Certification Requirements

For Both Assembled and Unassembled Batteries:

  • UN 38.3 Certification: All Li-polymer batteries must be tested and certified per the UN Manual of Tests and Criteria, Part III, Subsection 38.3.
  • Safety Data Sheet (SDS): Include an SDS outlining the composition, hazard identification, handling, and emergency measures related to the batteries.

Labeling and Documentation

  • Dangerous Goods Declaration: A completed and signed dangerous goods declaration is necessary for all hazardous materials, including Li-polymer batteries.
  • Marking of Packages: Mark and label packages with the appropriate hazardous material identifiers and handling instructions.
    Documentation for Li-Polymer Battery Specifications: Include documentation detailing li-polymer battery type, watt-hour rating, and quantity.
Specific Guidelines for Sea Transport
  • Adherence to IMDG Code: Ensure compliance with the International Maritime Dangerous Goods (IMDG) Code, which sets out the regulations for the maritime transport of dangerous goods.
  • Ventilated Storage: Store batteries in a well-ventilated area of the ship to prevent the accumulation of potentially hazardous gases.

Additional Considerations

For Batteries Assembled in Devices:

  • State of Charge (SoC): It is advised to ship devices with batteries at a charge level not exceeding 30% of their capacity.

For Batteries Not Assembled in Devices:

Quantity Limits: Adhere to specific quantity limits for standalone batteries as per shipping line policies and the IMDG Code.


Shipping Li-polymer batteries by sea, whether within devices or separately, requires careful attention to safety, legal standards, and proper packaging and labeling. It’s crucial to remain updated on the latest regulations and to consult with shipping experts or regulatory authorities when in doubt. Your commitment to these guidelines ensures your products’ safe and successful transportation.

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