Almost every device you sell online, from a phone to a laptop to a Bluetooth speaker, contains a lithium battery, which means it falls under hazmat shipping rules whether you realize it or not. The good news: for a normal device with the battery installed, the rules are straightforward and the risk is low. This guide covers what sellers actually need to know, the differences between carriers, when labeling matters, and how to ship safely without overthinking it.
Quick Answer
A device with its lithium battery installed (a phone, tablet, or laptop) is shippable by all major carriers, and by ground it stays simple. But one recent change matters a lot for used-tech sellers: USPS now bars pre-owned, used, damaged, or defective electronic devices with lithium batteries from air transportation. They must travel by ground (surface) only, be marked “Restricted Electronic Device” and “Surface Transportation Only,” and be handed to a retail counter or scheduled for pickup rather than dropped in a collection box. The stricter rules also still apply to loose or spare batteries shipped on their own. Confirm your carrier’s current lithium battery policy before you ship, since these regulations are updated periodically. Ready to list? Sell your device on Swappa and ship with confidence.
Why Lithium Batteries Are Regulated for Shipping
Lithium batteries store a lot of energy in a small space, and under rare conditions (physical damage, short-circuiting, or extreme heat) they can overheat or ignite. Because of that fire risk, they are classified as hazardous materials by regulators including the US Department of Transportation (DOT) and its Pipeline and Hazardous Materials Safety Administration (PHMSA), with international air rules set through IATA.
That “hazmat” label sounds alarming, but it does not mean shipping a used phone is dangerous or complicated. The regulations are designed mainly to prevent damaged or improperly packed batteries from being crammed together in bulk. For a single device with the battery sealed inside, the practical requirements are light.
The key distinction regulators draw is between batteries installed in equipment and batteries shipped loose or as spares. That single difference drives almost every rule you will run into.
Installed Batteries vs Loose Batteries: Why It Matters
This is the most important thing to understand, so here it is plainly.
Installed batteries are batteries inside the device they power: the battery in your iPhone, the pack in a MacBook, the cell in a smartwatch. These are the lowest-risk category because the device housing protects the battery and prevents accidental short-circuiting. Nearly every used electronics sale falls into this bucket.
Loose or spare batteries are batteries shipped on their own: a replacement laptop battery in its own package, spare 18650 cells, or a standalone power bank sold separately from a device. These face tighter rules, because loose terminals can touch metal or each other and short out. Carriers restrict how many you can send, how they must be packed, and often whether they can travel by air at all.
| Scenario | Typical treatment |
|---|---|
| Phone, tablet, or laptop with battery installed | Generally shippable by all carriers, fewer restrictions, ground preferred |
| Device plus a spare battery in the same box | Allowed within limits, but the spare must be protected from short-circuiting |
| Loose or spare battery shipped alone | Tighter quantity and packing rules, air restrictions common |
| Power bank shipped by itself | Treated as a loose battery, expect stricter handling |
The takeaway for most sellers: if you are shipping a normal used device with the battery in it, you are in the easy category. If you are sending batteries by themselves, slow down and check the specifics.
Carrier Rules and Limits: USPS, UPS, and FedEx
Each major carrier publishes its own lithium battery policy, and they overlap heavily but not perfectly. The general shape of the rules is consistent: installed batteries are easier, loose batteries are harder, and there are watt-hour and quantity limits that apply mostly to the loose category. The exact figures change over time, so treat the summary below as a map, not a rulebook, and confirm current limits on each carrier’s page before shipping.
| Carrier | Where to confirm rules | General posture on installed-battery devices |
|---|---|---|
| USPS | Publication 52 (Hazardous, Restricted, and Perishable Mail); current edition February 2026 | New devices with installed batteries are mailable by ground or air within limits, but used, pre-owned, damaged, or defective devices are restricted to surface (ground) transportation and must carry specific marks (see below) |
| UPS | UPS lithium battery guidance (Section II) | Installed batteries generally accepted; loose and larger batteries face stricter documentation and service limits |
| FedEx | FedEx lithium battery shipping requirements | Similar structure to UPS; clear separation between installed, packed-with, and loose battery categories |
A few practical notes that hold across carriers:
- Watt-hour (Wh) limits exist mainly to separate ordinary consumer batteries from oversized ones. Phones and most laptops sit comfortably under the thresholds where extra restrictions begin.
- Quantity limits apply far more to loose batteries than to a single installed-battery device.
- Air transport is where restrictions tighten most, especially for loose lithium batteries. Ground service usually avoids the strictest requirements (more on that below).
- Damaged, defective, or recalled batteries have their own rules and are often prohibited outright. Do not ship a swollen or damaged battery.
The USPS used-device rule sellers need to know
Because Swappa is a used-tech marketplace, one USPS requirement deserves special attention. Under current Publication 52 rules, pre-owned, used, damaged, or defective electronic devices that contain or are packed with lithium batteries may not be sent by air. They are limited to surface (ground) transportation. In practice that means three things when you ship a used device by USPS:
- Mark the outer packaging with both “Restricted Electronic Device” and “Surface Transportation Only.”
- Do not drop the package in a blue collection box or lobby chute. Hand it to a retail clerk at the counter or schedule a carrier pickup.
- Use sturdy, rigid outer packaging. USPS requires hazmat packages of 20 pounds or less to meet an edge crush test (ECT) of at least 32 or a burst strength of 200 lbs; heavier packages must meet ECT 44 or 275 lbs burst. Most quality corrugated boxes already clear this bar, but a flimsy reused box or a padded envelope may not.
USPS has also started enforcing a $50 hazmat noncompliance fee (effective July 12, 2026) on packages that are improperly declared, marked, or packaged, and the fee applies to Ground Advantage and other commercial services. Reusing an old box that still carries mismatched battery or hazmat markings is a common trigger, so remove or cover stale labels before you ship.
Because USPS Publication 52 and the UPS and FedEx guidance documents are updated periodically, the single most reliable habit is to check the carrier’s own lithium battery page the day you ship. That takes two minutes and keeps you compliant.
Labeling and Documentation Sellers Need
For most sellers shipping a used device with the battery installed, formal hazmat paperwork (a shipper’s declaration) is not required. The heavier documentation and hazard-class labeling requirements are aimed at bulk shipments and loose-battery shipments. But “no paperwork” does not mean “no marks” — as noted above, USPS requires used devices to carry the “Restricted Electronic Device” and “Surface Transportation Only” text on the outer box.
A few labeling practices are smart and sometimes required depending on the carrier, the battery size, and how the device is packed:
- The USPS text marks “Restricted Electronic Device” and “Surface Transportation Only” are mandatory on used, pre-owned, damaged, or defective lithium-battery devices sent by USPS. You can hand-write, stamp, or print them; just make sure they are legible on an outer surface.
- Some shipments call for a lithium battery mark (the standardized label showing the battery symbol). Note that as of the February 2026 edition of Publication 52, USPS removed the requirement to print a contact telephone number on that mark for domestic shipments. Whether you need the mark at all depends on the battery configuration and carrier, so check when you buy the label.
- If you sell through a platform, the carrier’s online shipping tool will often flag lithium content and prompt you to confirm the category. Answer honestly. That prompt is doing the compliance work for you.
- Keep the battery inside the device. A battery installed in equipment is treated more leniently than one packed loose alongside it.
The bigger compliance factor for sellers is not paperwork, it is packing. How you protect the device from impact and short-circuiting matters more than any sticker. We do not repeat the technique here because Swappa has a dedicated walkthrough: see how to pack electronics for shipping for the full method, and how to ship a phone for device-specific steps.
Ground vs Air: Choosing the Safer, Cheaper Option
If you have flexibility, ground shipping is usually the better call for lithium-battery devices. It sidesteps the strictest air-transport rules, it is typically cheaper for anything but the smallest or most time-sensitive packages, and it is entirely adequate for most domestic sales.
Air shipping is where lithium battery restrictions bite hardest, particularly for loose batteries and power banks. If you are sending a spare battery on its own, ground is often the only realistic option anyway.
For used devices specifically, ground is not just the smart choice, it is the required one on USPS: pre-owned, used, damaged, or defective lithium-battery devices are barred from air and must move by surface transportation. Since almost everything sold on Swappa is a used device, plan on ground when you ship USPS. UPS and FedEx handle installed-battery devices under their own rules, so if you have a genuine need for speed, check whether the specific device qualifies for an air service with that carrier, and expect to pay more.
For a deeper comparison of rates and services, Swappa’s guide to the cheapest way to ship electronics breaks down which carrier and service tend to come out ahead for used devices.
Selling and Shipping on Swappa
Swappa is a marketplace for used tech, and the listing standards themselves reduce shipping headaches before they start. Every listing is staff-reviewed, and devices must have a clean IMEI or ESN, be ready to activate, be fully paid off, have no activation lock, and show no water damage or cracked glass. That screening keeps damaged batteries and problem devices out of the pipeline, which is exactly what you want when lithium shipping rules are on the line.
Creating a listing is free, and Swappa’s selling fees are lower than typical auction-site fees (a 3% seller fee plus a 3% buyer fee already built into the listing price). If a shipping question comes up mid-sale, human support is available 24/7/365 with a response time around 20 minutes.
New to selling used tech? Start with how to sell used electronics, and for the full shipping picture from label to doorstep, use Swappa’s hub on how to ship electronics.
One guardrail worth repeating: do not try to sell or ship a device with a swollen, damaged, or otherwise failing battery. It fails Swappa’s listing criteria, and damaged lithium batteries are restricted or prohibited by carriers for good reason.
Frequently Asked Questions
Do I need special hazmat paperwork to ship a used phone?
Generally no shipper’s declaration is required for a phone with its battery installed. But USPS does require the outer package to be marked “Restricted Electronic Device” and “Surface Transportation Only” for used devices, and you must hand it to a counter or schedule a pickup rather than use a collection box. Answer any lithium prompt in the carrier’s shipping tool honestly and pack the device in a sturdy rigid box.
Can I ship a used phone or laptop by air?
Not via USPS. USPS bars pre-owned, used, damaged, or defective lithium-battery devices from air transportation; they must go by ground. New installed-battery devices can often travel by air within limits, and UPS and FedEx set their own air rules, but loose or spare batteries and power banks face tight air restrictions everywhere. Ground is the safer, usually cheaper, and for used USPS shipments the required default.
What is the difference between an installed battery and a loose battery for shipping?
An installed battery sits inside the device it powers and is protected by the housing, so it faces fewer restrictions. A loose or spare battery ships on its own, can short-circuit more easily, and is subject to tighter quantity, packing, and air-transport rules.
Do USPS, UPS, and FedEx have the same lithium battery rules?
The structure is similar across all three (installed batteries are easier, loose batteries are harder, watt-hour and quantity limits apply), but the details differ. USPS is currently the strictest for sellers: its Publication 52 rules restrict used, pre-owned, damaged, or defective lithium-battery devices to ground transportation with mandatory “Restricted Electronic Device” and “Surface Transportation Only” marks, and it enforces a $50 fee for noncompliant hazmat packages. Check the carrier’s own lithium battery page before you ship, since these rules are updated periodically.
Can I ship a device with a swollen or damaged battery?
No. Damaged, swollen, or defective lithium batteries are restricted or prohibited by carriers, and a device in that condition would not meet Swappa’s listing standards either. Do not ship it.
Conclusion
For the vast majority of sellers, shipping a lithium-battery device is far simpler than the hazmat label suggests. Keep the battery installed, pack it in a sturdy box, and confirm your carrier’s current policy on the day you ship. Just remember the one rule that trips up used-tech sellers most: USPS requires used lithium-battery devices to ship by ground, marked “Restricted Electronic Device” and “Surface Transportation Only,” and handed to a counter rather than dropped in a box. Get that right and the rest is straightforward.
Ready to turn that device into cash with a clean, staff-reviewed listing and support at every step?
