Battery knowledge · Vehicle and transport standards
FMVSS 305a
The US vehicle safety standard that replaces FMVSS 305 and largely adopts GTR 20. Besides protection against electric shock and electrolyte spillage, it adds requirements for the traction battery itself — overcharge, short-circuit and over-temperature protection, management of vented gases, water exposure — and extends coverage to heavy vehicles. The December 2024 final rule applies from September 2027 for light vehicles and 2028 for heavy ones.
- Also called
- FMVSS No. 305a
Example
Vehicle and transport standards: an example situation
Shipping tests and vehicle battery approval tests address different uses; passing one does not automatically satisfy another.
Read FMVSS 305a alongside Electric vehicle in this context. A vehicle driven by an electric motor from a battery charged from the grid. A battery electric vehicle has no engine; it is the largest market for lithium-ion cells and the driver of most pack technology.
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References & further reading
Further reading on this topic
These sources provide broader context; they are not presented as citations for every statement in this entry.
- UN Manual of Tests and Criteria, Revision 8
United Nations Economic Commission for Europe · 2023
Topic background · Dangerous-goods classification tests; subsection 38.3 concerns battery transport testing.
- Manual of Tests and Criteria, Revision 8, Amendment 1
United Nations Economic Commission for Europe · 2025
Topic background · Amendments to Revision 8, including changes to battery testing in subsection 38.3.