349.221 Lithium Metal (Nonrechargeable) Cells and Batteries — Domestic
For domestic mailings only, small consumer-type lithium metal cells or batteries (also called primary lithium cells or batteries) like those used to power cameras and flashlights are mailable domestically under the following conditions. See 622 or IMM 136 when mailing batteries internationally or to APO/FPO/DPO destinations.
General. The following restrictions apply to the mailability of all lithium metal (or lithium alloy) cells and batteries:
Each cell must contain no more than 1.0 gram (g) of lithium content per cell.
Each battery must contain no more than 2.0 g aggregate lithium content per battery.
Each cell or battery must meet the requirements of each test in the UN Manual of Tests and Criteria, part III, and subsection 38.3 as referenced in DOT’s hazardous materials regulation at 49 CFR 171.7.
All outer packages must have a complete delivery and return address.
All packaging must meet all applicable requirements specified in 49 CFR 173.185.
Except for mailpieces containing button cell batteries installed in equipment (including circuit boards), or no more than 4 lithium metal cells or 2 lithium metal batteries installed in the equipment they operate, mailpieces containing lithium metal batteries must bear markings that indicate that the package contains lithium metal cells or batteries; that the package is to be handled with care and that a flammable hazard exists if the package is damaged; that special procedures must be followed in the event the package is damaged, to include inspection and repacking, if necessary; and a telephone number for additional information. Mailers may use a DOT lithium battery handling label, in domestic air or surface transportation, to meet these marking requirements provided all required elements are included.
Except for mailpieces containing button cell batteries installed in equipment (including circuit boards), or no more than 4 lithium metal cells or 2 lithium metal batteries installed in the equipment they operate, mailpieces containing lithium metal batteries must also be accompanied by a document that indicates that the package contains lithium metal cells or batteries; an indication that the package is to be handled with care and that a flammable hazard exists if the package is damaged; an indication that special procedures must be followed in the event the package is damaged, to include inspection and repacking, if necessary; and a telephone number for additional information.