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USPS Packaging Instruction 9D

Lithium and Lithium-ion Cells and Batteries

  • When mailed domestically only: Primary lithium (nonrechargeable) cells and batteries and secondary lithium-ion (rechargeable) cells and batteries are mailable in limited quantities domestically via air or surface transportation when they are installed in or packed with the equipment they are intended to operate. Individual secondary batteries (without equipment) are mailable in limited quantities domestically via air or surface transportation only, provided the batteries are in the originally sealed packaging. Individual primary batteries (without equipment) are mailable in limited quantities only via surface transportation, provided the batteries are in the originally sealed packaging.
  • When mailed internationally or to and from APO, FPO, or DPO locations: Primary lithium (non-rechargeable) cells and batteries and secondary lithium-ion(rechargeable) cells and batteries are mailable in limited quantities internationally or to and from APO, FPO, or DPO locations via air or surface transportation only when they are properly installed in the equipment they operate.