Car Battery
Standard automotive lead-acid batteries are prohibited in both carry-on and checked baggage because they're a spillable, corrosive hazmat item.
Carry-on
Not allowed
Checked
Not allowed
Carry-on details
Not allowed. A standard car battery is a spillable, wet-cell lead-acid battery containing corrosive sulfuric acid. TSA and DOT hazardous materials rules prohibit spillable batteries from passenger aircraft entirely, so this isn't a packing question — it can't go through the checkpoint at all.
Checked-bag details
Not allowed. The same spillable-battery prohibition applies to checked baggage. The only lead-acid batteries permitted on passenger flights are sealed, non-spillable types (AGM or gel cell) rated 12 volts and 100 watt-hours or less — a typical automotive starting battery is rated well above 100 Wh, so it doesn't qualify even in its sealed AGM form.
Special instructions
If you need to transport a car battery, use a ground shipping carrier or a hazmat-certified freight service instead of checking it as luggage — this is a genuine DOT hazardous materials restriction, not just an airline policy.
FAQ
- Can I check a car battery in my luggage if I wrap it well?
- No. Standard automotive lead-acid batteries are classified as spillable hazmat and are banned from passenger aircraft regardless of packaging — wrapping or boxing it doesn't change the classification.
- Are any car batteries allowed on a plane?
- Only fully sealed, non-spillable AGM or gel-cell batteries rated at 100 watt-hours or less qualify for air travel, and most automotive starting batteries exceed that rating. A small sealed battery for something like a motorcycle or powersport vehicle might qualify — check the watt-hour rating printed on the case before assuming it's allowed.
Related items
Sources: TSA — What Can I Bring?, FAA — PackSafe (Hazardous Materials) · Last verified: 2026-08-01
Final decision rests with the security officer at the checkpoint.