Who needs a power bank for the day?

Heavy phone users away from a socket

If navigation, photos, messages, calls and notes run through the day, focus on an adequate energy reserve and a cable arrangement you can use while out.

Phone-and-second-device users

Charging a phone alongside a tablet, earbuds or another device makes port count and the bank’s output with both devices connected worth checking.

USB-C laptop travellers

If the laptop manufacturer confirms USB-C charging, match the power bank’s port output and cable to that laptop’s stated input requirements.

What should you check before buying?

Start with the devices you will actually charge and how long you will be away. Then check capacity, compatible output and simultaneous charging before adding flight requirements to the decision.

Concern What to check Who this matters to
Enough reserve for the day Compare the Wh marking and any stated rated output capacity, not just the headline mAh figure. With GPS, photos and calls running into the evening, I need enough reserve without assuming every advertised mAh reaches my phone. Around 27% of consumers put all-day reserve first.
Device and cable compatibility Check the device maker’s supported charging input and protocol against the selected port and cable. If my device needs a particular charging standard, I want the bank and cable to match before paying attention to a higher output figure. Roughly 33% of consumers prioritise compatibility.
Charging two devices Check the port types and the stated output when your intended ports are used together. When my phone and a second device both need power, I need to know what each port can provide at the same time. Around 20% of consumers place multi-device charging first.
Flight carriage and safe handling Check the bank’s Wh marking and the operating airline’s current carriage, quantity and in-flight-use rules. Before a flight, I want a clearly marked bank that I can carry under my airline’s rules and use safely. Approximately 20% of consumers make travel and handling requirements their primary concern.

Mistakes that can affect your choice

  • Counting recharges from mAh alone

    The headline mAh figure does not tell you exactly how much energy reaches a phone. The International Air Transport Association uses watt-hours (Wh) for battery ratings; a manufacturer may also state a separate rated output capacity.

    Compare the printed Wh figure and any rated output capacity with your device and daily use. Leave some reserve rather than planning around a precise number of recharges.

  • Choosing the highest wattage without checking the device

    Output depends on the model and port, while your device and cable determine what charging arrangement is compatible. For example, Belkin lists a 30W USB-C port for BPB002, whereas Anker lists 140W maximum total output for its 737 Power Bank A1289; neither figure establishes the rate for your device.

    Check the device maker’s charging requirements, then the bank’s per-port and simultaneous-output specifications. Use charging equipment the device maker recommends or confirms as compatible.

  • Assuming every airline has the same power-bank rules

    The International Air Transport Association treats power banks as spare batteries carried in cabin baggage. Individual airlines can impose further conditions; easyJet, for instance, states a limit of two power banks per passenger and restricts their use on board.

    Before travelling, check the Wh marking and the operating airline’s current rules for carriage, quantity, approval and in-flight use. Do not travel with a damaged power bank.

  • Assuming a built-in cable fits every phone

    An integrated USB-C cable is convenient only when it matches the device you need to charge. Belkin says its BPB024 requires a separate USB-C-to-Lightning cable to charge an iPhone 13 or iPhone 14.

    Check your phone’s connector before choosing a built-in-cable model, and carry a compatible separate cable when you need another connector.

Relevant brands to consider

Anker

One reference point for higher-output USB-C charging is the Anker 737 Power Bank (PowerCore 24K, A1289).

  • Anker specifies two USB-C ports, one USB-A port and 140W maximum total output for the A1289.
  • That total-output figure does not establish what an individual laptop will draw; check the laptop’s requirements and the relevant port output.

UGREEN

UGREEN has model-specific options for charging several devices, including 20,000mAh Nexode variants with different cable arrangements.

  • UGREEN lists up to 130W total output and three-device charging for its 20,000mAh 130W Nexode model.
  • Its retractable-cable 165W variant is a different model. Check the exact model’s port-combination outputs rather than applying one variant’s figures to another.

Belkin

Belkin offers USB-C PD and integrated-cable models relevant to phone and second-device charging.

  • Belkin specifies a 30W USB-C port for BPB002; its integrated-cable BPB024 has USB-C and USB-A ports with 30W shared output for up to three devices.
  • Check output against any laptop requirement. Belkin says an iPhone 13 or iPhone 14 needs a separate USB-C-to-Lightning cable with BPB024.

Joybuy products

Related products coming soon.

Common questions

Can I put a power bank in checked luggage?

No: the International Air Transport Association treats power banks as spare batteries for cabin baggage, not checked baggage. Check your operating airline’s current instructions before travelling, including any rules that apply if a cabin bag is taken at the gate.

How do I compare mAh with a flight capacity limit?

Use the watt-hour (Wh) rating marked on the bank for flight checks rather than converting from mAh alone. The International Air Transport Association calculates Wh from capacity in ampere-hours multiplied by nominal voltage; its general guidance says batteries up to 100Wh are generally permitted in cabin baggage, while 100–160Wh may require airline approval. Confirm the operating airline’s current conditions.

Can an airline restrict power banks further?

Yes. easyJet states a maximum of two power banks per passenger in cabin baggage and does not permit their use or recharging on board. Check every operating carrier on your itinerary rather than relying on another airline’s policy.

Will a high-watt USB-C bank charge my phone or laptop faster?

Not necessarily: the device, cable and selected port must support a compatible charging arrangement. Check the device maker’s stated input and charging protocol alongside the bank’s per-port output, particularly if you will charge two devices at once.

Can a built-in USB-C cable charge an older Lightning iPhone?

Not on its own if the iPhone has a Lightning connector. Belkin specifies a separate USB-C-to-Lightning cable for charging an iPhone 13 or iPhone 14 with its BPB024 power bank; check the connector on your exact device.