Does a 145W power bank need airline approval? Read the Wh rating first

Find the right line on your power bank

Turn it over and read the small print before searching for a replacement. You are looking for three pieces of information:

• Model identifier: the exact version you own, rather than a similar-looking product in a shop listing.
• Battery energy in Wh: the figure to compare with the airline’s capacity bands.
• Battery capacity and its corresponding voltage: useful if the label needs explaining or checking.

Keep input and output specifications separate. A list such as 5V, 9V, 12V or 20V usually describes charging connections, not alternative battery capacities you can choose for airline purposes.

In everyday terms, watts describe the rate at which energy is delivered; watt-hours describe an amount of energy. A bank can supply high power while holding less than 100Wh. Conversely, a slow-charging bank can still have a large battery. Neither charging speed nor the number of ports settles the flight question.

A real example of the output-voltage trap

Anker’s A1277, sold as the Anker 337 Power Bank or PowerCore 26K, illustrates why reading the whole specification matters. Its official page gives 26,800mAh / 96.48Wh as capacity and separately lists 5V input and output ratings. Anker A1277 specifications

Multiplying 26.8Ah by that 5V output would produce 134Wh. That arithmetic uses mismatched figures: it does not replace the manufacturer’s stated 96.48Wh battery rating. The conversion from the cells to a USB output is why you should not grab whichever voltage is easiest to spot.

This is a label-reading example, not a recommendation to buy an older model. For either brand, compare the specifications with your own unit; a familiar product name is not enough to establish its revision or condition.

Why 27,000mAh is only an approximation

CAAS’s capacity guidance describes 100Wh as approximately 27,000mAh. The important word is “approximately”. Its actual capacity categories are expressed in Wh. CAAS power-bank FAQ, pages 1–2

The conversion is:

Wh = (mAh ÷ 1,000) × the corresponding battery voltage

The FAA’s battery guidance describes this same unit conversion. Use it to understand a manufacturer’s battery figures, rather than substitute a USB output voltage. FAA explanation of watt-hours

For illustration, a stated battery capacity of 27,600mAh at 3.6V calculates to 99.36Wh. At 3.7V it calculates to 102.12Wh. These are arithmetic examples, not specifications for an unnamed 27,600mAh product.

That difference is enough to cross the 100Wh boundary. Use the printed Wh rating or obtain the exact battery specification from the manufacturer. Do not choose 3.6V because it produces the answer you want, round a larger rating down, or relabel the bank yourself.

Singapore Airlines’ capacity categories

SIA currently publishes these bands for power banks:

• Up to and including 100Wh: no prior approval required under its capacity rule.
• More than 100Wh, up to and including 160Wh: prior approval required.
• Above 160Wh: not permitted in passenger baggage.

SIA permits a maximum of two power banks per passenger, in cabin baggage only. Singapore Airlines baggage restrictions

A bank’s capacity category is only one check. A legible rating does not make a damaged or recalled battery suitable for travel. If the casing is swollen or damaged, do not treat an approval email as a workaround. FAA guidance on damaged batteries

What to prepare if SIA approval is needed

For the over-100Wh to 160Wh category, follow the form linked from SIA’s baggage page. Prepare a clear photo identifying the bank and its ratings, and official documentation showing compliance with the UN Manual of Tests and Criteria, Part III, subsection 38.3. Ask the manufacturer or retailer for the exact model’s documentation; SIA says an online marketing claim is insufficient and requests must use its form. SIA’s approval instructions

Before contacting support, make sure the model on the document matches the bank in your hand. Save the airline’s response with your travel documents. Requesting approval and receiving it are separate steps, so leave time to resolve a missing certificate or mismatched model.

For a clearly labelled 90Wh bank, do not assume this larger-battery application is necessary just because “145W” appears on the front.

Packing and using it on the flight

Since 15 April 2026, CAAS has limited passengers departing Singapore to two power banks. They belong in cabin baggage and need individual protection against short circuits, such as a protective pouch. Charging a power bank on board is prohibited. CAAS also advises against using one to charge another device and warns that airlines can be stricter. CAAS’s April 2026 notice

SIA prohibits both use and charging during the flight and says to keep power banks accessible, rather than in overhead compartments. SIA’s onboard restrictions

Scoot’s own advisory also limits passengers to two, prohibits onboard use and charging, requires cabin carriage and says they should not go in overhead compartments. It allows up to 100Wh without special approval and requires approval above that, within its stated 160Wh limit. Use Scoot’s own contact route for approval; the SIA application instructions above should not be assumed to apply. Scoot’s power-bank advisory

Before departure, check each operating airline on the itinerary and any destination-specific restrictions. Pack according to the most restrictive applicable requirement, with the bank’s label accessible. The quickest starting point remains the small Wh line on your actual unit.