No, you generally cannot ship standalone RC car batteries via USPS if they are lithium-based. The United States Postal Service has strict regulations regarding lithium batteries in the mail due to their potential fire risk. This prohibition primarily affects the most common types of RC batteries: Lithium Polymer (LiPo) and Lithium-ion (Li-ion). Small, installed batteries might be allowed under specific rules, but for the average hobbyist mailing a spare pack, USPS is not a viable option.
The key issue is the battery's chemistry and whether it's shipped alone or installed in the RC car. USPS regulations differentiate between batteries contained in equipment and those shipped by themselves.
- Standalone Lithium Batteries: Shipping loose LiPo or Li-ion batteries via USPS air or ground mail is prohibited. This is because damaged batteries can short-circuit and ignite.
- Batteries Installed in Equipment: There is an exception for smaller batteries (under a specific watt-hour rating) that are installed in the electronic device—in this case, inside your RC car. The device must be securely packaged to prevent accidental activation, and specific labeling is often required. However, this is a complex process meant for commercial shippers, not typically for individual consumers.
For shipping loose batteries, you must use alternative carriers like FedEx or UPS, which have their own set of dangerous goods protocols. You will be required to declare the contents, package the batteries correctly (terminal taps protected, in a sturdy box), and likely ship via ground service.
| Carrier | Can Ship Loose LiPo Batteries? | Key Requirements / Notes |
|---|
| USPS | Generally No | Prohibited for standalone shipment. Limited exception for small batteries installed in equipment. |
| FedEx | Yes, with restrictions | Must be declared as Dangerous Goods. Often requires a Dangerous Goods contract. Ground shipping is typical. |
| UPS | Yes, with restrictions | Must be shipped under "UPS Dangerous Goods" program. Specific packaging and labeling are mandatory. |
| DHL | Yes, with restrictions | Accepts lithium batteries under their dangerous goods service; requires advance approval and proper documentation. |
The safest and most straightforward approach is to always check the official website of your chosen carrier for the most current rules before you attempt to ship. Regulations are updated frequently, and non-compliance can result in your package being rejected or destroyed.
