Best Portable Chargers: Power Banks Approved for Flights

Modern travel requires power. From accessing digital boarding passes to watching movies during a long layover, a dead phone or laptop can turn a smooth trip into a stressful ordeal. However, you cannot simply toss any battery into your luggage. The FAA and TSA have strict safety guidelines regarding lithium-ion batteries. This guide covers the specific regulations you need to know and highlights the best power banks that maximize power while staying legal for air travel.

Understanding TSA and FAA Regulations

Before buying a charger, you must understand the rules enforced by the Federal Aviation Administration (FAA) and the Transportation Security Administration (TSA). The regulations are primarily about safety, as lithium-ion batteries can pose a fire risk if damaged or short-circuited.

The 100 Watt-Hour Limit

The most critical number to remember is 100 watt-hours (Wh).

  • Carry-On Only: You must pack spare lithium-ion batteries (power banks) in your carry-on baggage. They are strictly prohibited in checked luggage. If the cargo hold pressurization changes or the battery is crushed, it could cause a fire that automatic suppression systems cannot reach.
  • The Limit: You can bring batteries with a capacity of up to 100Wh without needing airline approval.
  • The Exception: For batteries between 101Wh and 160Wh, you generally need specific airline approval, and you are usually limited to two such batteries. Anything over 160Wh is forbidden.

Converting mAh to Wh

Most power banks are marketed by milliamp-hours (mAh), not watt-hours. This can make the math confusing. To check if your charger is legal, use this formula:

(mAh / 1000) x Voltage = Watt-Hours

Most standard power banks operate at 3.6 or 3.7 volts.

  • 20,000mAh: (20,000 / 1000) x 3.7V = 74Wh (Safe to fly)
  • 26,800mAh: (26,800 / 1000) x 3.7V = 99.16Wh (Safe to fly)
  • 30,000mAh: (30,000 / 1000) x 3.7V = 111Wh (Requires approval or prohibited)

Rule of thumb: Any power bank labeled 27,000mAh or lower is generally safe for flight. Avoid 30,000mAh models if you want a hassle-free security experience.

Best High-Capacity Power Banks (Laptop Capable)

If you need to keep a MacBook, Dell XPS, or iPad Pro alive during an international flight, you need high output and maximum legal capacity.

Anker 737 Power Bank (PowerCore 24K)

This is widely considered the gold standard for travelers who carry laptops.

  • Capacity: 24,000mAh (88.8Wh). It sits comfortably under the TSA limit.
  • Output: It features ultra-fast 140W charging via USB-C. This is powerful enough to charge a 16-inch MacBook Pro at fast speeds.
  • Features: It includes a smart digital display that shows exactly how much power is coming in and going out, along with the estimated time until the battery is full or empty.

Zendure SuperTank

Zendure designed this tank specifically to hit the maximum legal limit.

  • Capacity: 27,000mAh (99.9Wh). It offers the absolute most power you can carry without asking for airline permission.
  • Output: It delivers 100W power delivery (PD).
  • Durability: The suitcase-style ridges on the exterior make it durable against drops and crushing forces inside a stuffed backpack.

Goal Zero Sherpa 100AC

This is a favorite for photographers and content creators because it offers versatility beyond just USB ports.

  • Capacity: 25,600mAh (94.7Wh).
  • Versatility: It includes an AC inverter port. This means you can plug a standard two-prong wall plug directly into the battery. It also features Qi wireless charging on the top deck.
  • Note: The AC inverter takes up space, so this unit is physically larger than the Anker or Zendure options.

Best Compact Power Banks for Phones

If you only need to charge an iPhone or Samsung Galaxy once or twice and want to keep your bag light, these are the best compliant options.

Nitecore NB10000 Gen 2

This is popular among hikers and “one-bag” travelers because of its weight-to-power ratio.

  • Weight: It weighs only 5.29 ounces, which is roughly 40% lighter than conventional 10,000mAh power banks.
  • Material: The casing is made of carbon fiber reinforced polymer.
  • Capacity: 10,000mAh (38.5Wh). This is enough to charge a modern smartphone about two times.

Anker 622 Magnetic Battery (MagGo)

For iPhone 12 and newer users, cables can be a nuisance in cramped economy seats.

  • Mechanism: This snaps magnetically to the back of the phone using MagSafe.
  • Capacity: 5,000mAh. It won’t fully charge a Pro Max model from 0 to 100%, but it will provide that crucial 60-70% boost to get you to your hotel.
  • Utility: It includes a foldable kickstand, allowing you to prop the phone up on your tray table to watch downloaded movies while it charges.

Critical Features to Look For

When shopping for a flight-approved charger, verify these three specifications:

1. USB-C Power Delivery (PD) Old USB-A ports charge slowly. Ensure your power bank has a USB-C PD port. This allows for fast charging of the bank itself (input) and fast charging of your devices (output). A 20,000mAh battery without PD might take 10 hours to recharge, whereas a PD model can recharge in 2 to 3 hours.

2. Pass-Through Charging This feature allows you to charge the power bank from a wall outlet while the power bank simultaneously charges your phone. This is vital in hotels or airports where outlets are scarce. You can plug everything into one outlet overnight and wake up with all devices full.

3. Clear Wh Markings Occasionally, TSA agents inspect batteries closely. It is helpful if the manufacturer has clearly printed the Watt-Hour rating on the casing. If the label has rubbed off or is unreadable, an agent has the right to confiscate the battery if they suspect it exceeds the limit.

Frequently Asked Questions

Can I use my power bank during the flight?

Yes, you can generally use it once the plane is at cruising altitude. However, flight attendants may ask you to disconnect it during takeoff and landing. Some airlines prohibit charging devices using large batteries while the “fasten seatbelt” sign is on. Always follow crew instructions.

What happens if I accidentally put my charger in my checked bag?

If airport security scanners detect a lithium-ion battery in your checked luggage, they will usually open the bag and remove the device. They will often leave a note stating that a prohibited item was removed. You will likely lose the power bank permanently.

Are there brands I should avoid?

Be cautious with cheap, no-name brands found at gas stations or discount electronics sites. These often exaggerate their capacity specifications or lack necessary safety circuits that prevent overheating. Stick to reputable brands like Anker, Mophie, Belkin, Zendure, and OtterBox to ensure safety and compliance.

Do I need to take the charger out of my bag at security?

This depends on the airport and the screening technology (TSA PreCheck vs. standard lanes). In standard lanes, you usually need to remove any electronics larger than a cell phone. This includes large power banks. In lanes with new CT scanners, you can often leave everything inside the bag. Listen to the agents for specific instructions.