Lithium cells now turn up in places shippers do not always anticipate: test equipment, handheld tools, sensor packages, spare units inside a larger assembly. Each of those makes the consignment a dangerous goods shipment, with consequences for packing, marking, documentation, and which aircraft or vessel will accept it at all.
100 Wh
Above this rating, air carriage of spare batteries generally needs carrier approval
160 Wh
Above this rating, passenger aircraft are normally excluded altogether
20 Wh
Common cell-level threshold used alongside the battery limits
| Packing scenario | What it means | Typical effect |
|---|---|---|
| Batteries alone | Shipped as cargo in their own right | Strictest handling and state-of-charge rules |
| Packed with equipment | Separate battery in the same carton | Intermediate requirements |
| Installed in equipment | Fitted inside the device | Least restrictive, still a declared shipment |
The rules are detailed and are revised regularly, distinguishing between cells shipped alone, cells packed with equipment and cells installed in equipment, with different thresholds by watt-hour rating and state of charge. Getting the classification wrong is not a technicality. A misdeclared battery consignment can be refused at the terminal, offloaded mid-journey, or — in the worst case — become a serious safety incident. Carriers have limited patience and no obligation to help you correct it.
Our approach is to establish the classification at quotation stage, before a routing is promised. That means asking what is actually inside the equipment rather than accepting a general description, confirming the packing instruction that applies, and ensuring the shipper’s declaration matches the physical packing exactly. It slows the first conversation by an hour and reliably saves days later.
Harbour Strategies (HK) Limited · 7 April 2026
Editorial commentary by Harbour Strategies. Figures and regulatory details should be verified against primary sources before being relied upon.
