Power banks have specific rules, and ignoring them can get your battery confiscated. The key number is your battery’s watt-hour (Wh) rating. Most travelers don’t know what that is. This guide tells you exactly how to find it and what the limits mean.
TSA Rules Summary
- Power Banks in Carry-On: ✅ Allowed (with watt-hour limits)
- Power Banks in Checked Baggage: ❌ Prohibited — all sizes
- Under 100Wh: ✅ No approval needed — carry-on only
- 100–160Wh: ⚠️ Airline approval required — carry-on only
- Over 160Wh: ❌ Prohibited on passenger aircraft
- TSA Declaration Required: No (but airline approval may be required for 100–160Wh)
Official Regulations
Why Power Banks Must Be in Carry-On
Power banks contain lithium-ion batteries. The FAA prohibits lithium battery devices in checked baggage because if a battery malfunctions and catches fire in the cargo hold, it cannot be quickly detected or suppressed by crew. In the cabin, a fire can be spotted and extinguished immediately.
[!IMPORTANT] Power banks are never allowed in checked baggage — regardless of their size or capacity. This is a strict FAA rule with no exceptions. If a gate agent asks you to check your bag at the last minute, remove your power bank first.
Understanding Watt-Hours (Wh)
The watt-hour rating is the key number for power bank compliance. Here’s how to find it:
- Check the label on the power bank itself
- Look it up by model number on the manufacturer’s website
- Calculate it:
Wh = (mAh × V) ÷ 1000- Example: 20,000mAh at 3.7V = 74Wh ✅ (well under the 100Wh limit)
Common power bank capacities converted to Wh:
| Capacity (mAh) | Voltage | Watt-Hours | Allowed? |
|---|---|---|---|
| 5,000 mAh | 3.7V | ~18.5 Wh | ✅ Yes |
| 10,000 mAh | 3.7V | ~37 Wh | ✅ Yes |
| 20,000 mAh | 3.7V | ~74 Wh | ✅ Yes |
| 26,800 mAh | 3.7V | ~99 Wh | ✅ Yes (just under limit) |
| 30,000 mAh | 3.7V | ~111 Wh | ⚠️ Airline approval needed |
| 43,000 mAh | 3.7V | ~160 Wh | ⚠️ Maximum with approval |
| 50,000 mAh+ | 3.7V | ~185 Wh+ | ❌ Prohibited |
Most consumer power banks (Anker, Xiaomi, Aukey, RAVPower) are under 100Wh and are fully permitted without any approval.
Quantity Limits
- Under 100Wh: No quantity limit specified by TSA, but airlines may set their own (typically 2–3 per passenger)
- 100–160Wh: Maximum of 2 per passenger, airline approval required
Airline-Specific Policies
| Airline | Under 100Wh | 100–160Wh | Checked Bag |
|---|---|---|---|
| United Airlines | ✅ Allowed | ⚠️ Approval required | ❌ Prohibited |
| Delta | ✅ Allowed | ⚠️ Approval required | ❌ Prohibited |
| American Airlines | ✅ Allowed | ⚠️ Approval required | ❌ Prohibited |
| Ryanair | ✅ Allowed (up to 100Wh) | ❌ Not permitted | ❌ Prohibited |
| British Airways | ✅ Allowed | ⚠️ Approval required | ❌ Prohibited |
| Air France | ✅ Allowed | ⚠️ Approval required | ❌ Prohibited |
| Emirates | ✅ Allowed | ⚠️ Approval required | ❌ Prohibited |
Note: Ryanair is stricter than most — they generally do not allow power banks between 100–160Wh without prior written approval, which is rarely granted for economy passengers.
Essential Traveler Tips
- Check the Wh label — Before your trip, find the watt-hour rating on your power bank. If it’s not printed, calculate it from the mAh and voltage.
- Keep it in your carry-on always — Never put a power bank in checked luggage. If you’re asked to gate-check your bag, take out the power bank and carry it on.
- For budget airlines — Budget European carriers (Ryanair, EasyJet, Wizz Air) have stricter policies. Stick to power banks under 100Wh.
- Protect the terminals — TSA recommends keeping lithium battery terminals covered (with tape or original packaging) to prevent accidental short circuits.
Common Mistakes to Avoid
- Mistake 1: Putting a power bank in checked luggage. This is the single most common power bank mistake. Gate agents and airline staff will confiscate it. Always carry-on.
- Mistake 2: Assuming mAh = Wh. A 20,000mAh power bank is NOT 20,000Wh — it’s about 74Wh. The mAh and Wh are completely different measurements.
- Mistake 3: Bringing multiple large power banks without checking airline limits. Most airlines allow 2 power banks per passenger. Bringing 4 or 5 may cause issues at security.
Frequently Asked Questions
Q: Can you bring a power bank on a plane? A: Yes, in carry-on baggage only. Power banks are prohibited in checked bags.
Q: Does TSA allow power banks? A: Yes. Power banks under 100Wh are permitted in carry-on with no restrictions. 100–160Wh requires airline approval.
Q: Can I put a power bank in checked luggage? A: No. All power banks are prohibited in checked bags under FAA regulations.
Q: What size power bank can I bring on a plane? A: Under 100Wh: freely allowed. 100–160Wh: allowed with airline approval. Over 160Wh: prohibited.
Q: Can I bring a 20,000mAh power bank on a plane? A: Yes. A 20,000mAh power bank at 3.7V is approximately 74Wh — well within the 100Wh limit.
Q: What is the United Airlines powerbank limit? A: United allows power banks under 100Wh freely. Banks between 100–160Wh require prior airline approval. Over 160Wh is prohibited.
Conclusion
Power banks are carry-on only — no exceptions. For most travelers with standard consumer power banks (under 100Wh), there’s nothing to worry about. Check your watt-hour rating, pack it in your carry-on, and you’ll pass through security without issue. For large capacity banks over 100Wh, contact your airline before travel to get approval in writing.