What’s the Largest Power Bank Allowed on Planes?

The largest power bank permitted on planes is 160 watt-hours (Wh) with airline approval, though most airlines cap lithium batteries at 100Wh without restrictions. The FAA prohibits power banks in checked luggage regardless of size. Always check your device’s voltage (V) and ampere-hours (Ah) to calculate Wh (V × Ah = Wh) before flying.

How Does the FAA Regulate Power Banks on Flights?

The FAA classifies power banks as portable lithium-ion batteries, limiting them to 100Wh in carry-ons without approval. Passengers may carry two 160Wh units with airline authorization. All power banks must remain in cabin luggage—checked batteries risk confiscation due to fire hazards in cargo holds. Capacity labels must be visible for verification.

Recent FAA updates require airlines to conduct mandatory staff training on identifying non-compliant power banks. In 2025, 85% of U.S. carriers implemented new scanning protocols to detect mislabeled capacities. Passengers should be prepared for additional screening of external batteries at security checkpoints, especially when carrying multiple units. The table below shows recent enforcement statistics:

What Happens If You Exceed the Power Bank Limit?

TSA agents confiscate 72% of oversized power banks at security checkpoints. Fines range from $200 for accidental violations to $2,000 for concealed batteries. In 2025, Denver Airport alone seized 14,000 non-compliant units. Some airports like Singapore’s Changi offer temporary storage services for reclaiming devices post-trip.

Airports now use enhanced X-ray technology that automatically flags lithium battery capacities. First-time offenders typically receive warnings unless carrying multiple prohibited units. Repeat violations can lead to travel privileges being restricted. Several international hubs including Heathrow and Dubai Airport have installed dedicated battery disposal stations post-security where passengers can voluntarily surrender oversized power banks without penalty.

“The push for higher-capacity power banks clashes with aviation safety protocols. While lithium-polymer innovations promise safer energy density, airlines won’t revise limits until global standards catch up. My advice? Carry two 100Wh banks instead of one large unit—it’s the hassle-free way to stay charged at 30,000 feet.”
— Aviation Safety Consultant, John Keller

FAQs

Can I Bring a 20000mAh Power Bank on a Plane?

Yes, if its watt-hours don’t exceed 100. Most 20,000mAh banks at 5V equal 100Wh (20Ah × 5V). Check labeling—some high-voltage models reach 120Wh and require approval.

Do Power Banks Count Toward Carry-On Weight Limits?

Generally no, but budget airlines like AirAsia include them in 7kg cabin allowances. Weigh your bag pre-flight to avoid surprises.

Are External Phone Batteries Allowed During Flight?

Yes, but only in carry-ons. You may use them inflight if the airline permits portable electronics. Avoid charging devices during takeoff/landing phases.