Power banks are essential travel accessories, but they’re also one of the most misunderstood items when it comes to airline rules. The regulations are based on the watt-hour (Wh) rating of the battery inside — a number most travelers have never looked up. Get it wrong and your power bank gets confiscated at security or handed over by gate agents. This guide makes the rules crystal clear.
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.