The Transportation Security Administration (TSA) allows lithium batteries in both carry-on and checked luggage, as long as they meet certain requirements. The batteries must be:
- Rechargeable
- In their original packaging
- Not exceeding 100 watt-hours (Wh) for carry-on luggage
- Not exceeding 160 Wh for checked luggage
If you are bringing a lithium battery that does not meet these requirements, you may need to get special permission from the TSA.