Packing a power bank for flights to Japan
Checked against 5 official sources. 8 minute read.
What to know first
For departures covered by Japan’s current rules, carry power banks in cabin baggage: at most two, each 160 Wh or less. Charging a power bank onboard is prohibited, and MLIT asks passengers not to use one to charge another device. JAL asks passengers to keep power banks within sight rather than in an overhead bin. Check the operating airline’s separate capacity rules; JAL’s conditions above 100 Wh are not established here.
Conditions to check
- Check every operating airline on your itinerary; some set stricter rules than MLIT, and a 160 Wh rating alone doesn't make a third bank allowed.
- Banks over 100 Wh reduce how many other spare batteries over 100 Wh you may carry: two such banks leave room for none.
- Keep power banks in the cabin with taped terminals, in the seat pocket or at your feet, and don't charge them from the seat socket.
- Per passenger
- Up to two power banks, each 160 Wh or lessRule in force since 24 April 2026
- Where they go
- Cabin baggage, not checked bags
- On board
- Charging the power bank itself is prohibited
On this page
Your power bank, and what to do
| Your situation | What to do |
|---|---|
| 100 Wh or less (27,000 mAh × 3.7 V = 99.9 Wh) | Allowed in cabin baggage; it counts as one of your two power banks. |
| Over 100 Wh and up to 160 Wh | Allowed in cabin baggage, but two such banks leave room for no other spare battery over 100 Wh. Check the operating airline's own capacity rules. |
| Over 160 Wh (for example 50,000 mAh) | Not allowed, in the cabin or in checked bags. Leave it at home. |
| You want to bring a third power bank | Not allowed: the limit is two power banks, each 160 Wh or less. |
| The label shows only mAh | Multiply mAh by the cell's rated voltage (usually 3.6 V or 3.7 V) and divide by 1,000. Don't use the 5 V USB output. |
| Packing it for the flight | Keep it in cabin baggage with the terminals taped, in the seat pocket or at your feet, and don't charge it or use it to charge a device onboard. |
Sources for this section: MLIT: passenger power-bank safety instructions · ANA: conditional carriage of batteries and power banks
The answer changes with each bank's watt-hours and how many you carry: two banks of up to 160 Wh each are the limit, banks over 100 Wh reduce the number of other large spare batteries you may bring, and anything over 160 Wh stays at home.
Check the operating airline for every flight
Do not use a single remembered power-bank rule for an entire multi-airline trip. Record the operating carrier and date for each flight, then read its current lithium-battery guidance. Permission to carry an item and permission to use it in flight are separate conditions.
This guide is designed for packing and trip planning, not as an official approval of any specific battery. An online product listing, a "travel-friendly" label, or a previously uneventful flight does not guarantee that an item complies with current airline regulations for your next flight sector.
Sources for this section: JAL: restricted baggage items · ANA: international baggage and power-bank handling
The 2026 rule changes make older flight tips obsolete
Under MLIT regulations taking effect 24 April 2026, passengers may bring up to two power banks of no more than 160 Wh each, and charging power banks onboard is prohibited. The 160 Wh ceiling is not unconditional permission: check each operating airline’s capacity and spare-battery rules. MLIT asks travellers not to use power banks to charge devices during flights, and ANA asks passengers to refrain. JAL’s English page asks passengers to keep power banks within sight rather than in overhead bins; its specific conditions above 100 Wh are not established here. MLIT’s calculation is watt-hours = capacity in mAh ÷ 1,000 × rated voltage: 27,000 mAh × 3.7 V = 99.9 Wh. Use the voltage on the battery, not a guessed figure. Its leaflet says breaches of rules 1–3, 5 and 6 can bring penalties under the Civil Aeronautics Act; rule 7, not using a power bank to charge another device, is a request.
Use the rules published for the operating airline and your actual travel date. This guide does not by itself show a JAL capacity-limit change from January 2027 or a JAL rule about charging another device, because the relevant Japanese material could not be verified in the recorded review.
Sources for this section: MLIT: new power-bank carriage rules from 24 April 2026 · JAL: restricted baggage items · ANA: international baggage and power-bank handling · MLIT: passenger power-bank safety instructions
Power banks belong in properly packed carry-on baggage
JAL's guidance separates power banks from devices with built-in batteries and does not permit power banks in checked baggage. MLIT asks for terminal short-circuit protection and storage within reach rather than in an overhead bin. ANA's conditional-baggage page distinguishes power banks from other spare batteries and notes that the combination can affect the allowed count above 100 Wh. Check the operating carrier and actual item rather than applying a laptop rule to a spare battery.
Do not count only the power banks while ignoring other relevant spare batteries. Before handing over a bag, identify every item that the carrier requires to remain with you. If an item is unclear, ask the airline or check-in staff rather than hiding it in a different bag.
Sources for this section: JAL: restricted baggage items · ANA: international baggage and power-bank handling · ANA: conditional carriage of batteries and power banks · MLIT: passenger power-bank safety instructions
Read the actual capacity marking
Use the manufacturer’s rating and the carrier’s requested information to identify the item. If the label gives only mAh, use MLIT's formula in the table below with the cell's rated voltage. Do not substitute a marketing capacity number or guess the voltage to make an unknown watt-hour value fit a limit. The correct classification depends on the actual battery, not an attractive number in a sales title.
Having a photo of your device's battery specifications label will help you make a precise inquiry through the airline's official support channels. Please note that this guide does not offer battery safety inspections. For damaged, recalled, or malfunctioning equipment, always follow the specific instructions from the manufacturer and your carrier.
Worked example: is my power bank allowed?
MLIT's formula: watt-hours = rated capacity (mAh) × rated voltage (V) ÷ 1,000. Use the rated voltage of the battery cell printed on the label (usually 3.6 V or 3.7 V), not the 5 V USB output.
5,000 mAh: 18.0 Wh at 3.6 V, 18.5 Wh at 3.7 V. Allowed; counts as one of your two.
10,000 mAh: 36.0 Wh at 3.6 V, 37.0 Wh at 3.7 V. Allowed.
20,000 mAh: 72.0 Wh at 3.6 V, 74.0 Wh at 3.7 V. Allowed.
26,800 mAh: 96.5 Wh at 3.6 V, 99.2 Wh at 3.7 V. Allowed; under 100 Wh.
27,000 mAh: 97.2 Wh at 3.6 V, 99.9 Wh (MLIT's own example) at 3.7 V. Allowed; under 100 Wh.
30,000 mAh: 108 Wh at 3.6 V, 111 Wh at 3.7 V. Allowed, but in the 100–160 Wh band, which limits your spare batteries.
40,000 mAh: 144 Wh at 3.6 V, 148 Wh at 3.7 V. Allowed; 100–160 Wh band.
50,000 mAh: 180 Wh at 3.6 V, 185 Wh at 3.7 V. Not allowed, in the cabin or in checked bags.
Common mistake: 20,000 mAh × 5 V gives "100 Wh", which looks over the line. The correct figure is 72–74 Wh, because the battery's rated voltage is 3.6–3.7 V. If the label shows Wh, use that number.
Example trip: you carry a 10,000 mAh phone bank (37 Wh) and a 26,800 mAh laptop bank (99.2 Wh). That's two power banks, both at 100 Wh or less, so both may go in your cabin bag. You may also carry spare camera batteries of 100 Wh or less (ANA: up to 20). Neither bank may be charged from the seat socket. The arithmetic is ours, from MLIT's formula.
Sources for this section: MLIT: passenger power-bank safety instructions · ANA: conditional carriage of batteries and power banks
Power banks plus other spare batteries: what the rules allow
Two power banks, each 100 Wh or less: no count limit under MLIT on spare batteries of 100 Wh or less (ANA: up to 20), and up to two spare batteries over 100 Wh and up to 160 Wh.
Two power banks, each over 100 Wh and up to 160 Wh: spare batteries of 100 Wh or less as above, and no spare batteries over 100 Wh.
One power bank of each kind: spare batteries of 100 Wh or less as above, and up to one spare battery over 100 Wh.
A third power bank, or any power bank over 160 Wh: not allowed. Leave it at home.
All of these go in the cabin, never in checked baggage. Tape the terminals or bag each one, and keep them in the seat pocket or at your feet, not in the overhead bin. Some airlines set stricter rules, and MLIT's leaflet says you should follow them.
Sources for this section: MLIT: passenger power-bank safety instructions · ANA: conditional carriage of batteries and power banks
Plan ahead for days you use digital tickets without relying on in-flight power
Charge and prepare the devices before the flight where appropriate, and arrange access to permitted travel information without assuming a power bank can be used onboard. Consider the chain after landing: immigration information, onward transport and accommodation contact may all depend on the same device.
Keep an authorised offline or paper alternative where the service allows one. A screenshot is not universally a valid ticket, and another traveller’s phone is not automatically permitted to present your credential.
Check each transfer point individually instead of relying on the most lenient rule
For a trip involving more than one operating airline, compare the applicable requirements before departure. A carrier accepting an item on the first flight does not guarantee that a connecting carrier will accept it. Keep any specific approval and item identification together.
If rules seem to clash, follow the stricter one, as MLIT's leaflet says, and pack to comply on every leg. The goal is a smooth trip from start to finish, not carrying the theoretical maximum number of batteries.
Check again before you fly and always follow crew instructions
Set a reminder to review the carrier's latest baggage policy before your flight date, especially if your flight or aircraft type changes. Note the specific date and official page you checked instead of treating items as permanently approved.
This guide does not grant legal exemptions, certify batteries, or guarantee in-seat power outlet access. Always follow the current instructions from your airline and flight crew. Purchasing a spare battery simply to tick off a checklist is not recommended.
Key facts and check dates
Power banks per passenger: two, each 160 Wh or less, cabin only (MLIT rule in force since 24 April 2026, press release of 14 April 2026).
Charging the power bank itself on board: prohibited, with penalties possible (MLIT leaflet).
Charging other devices from it: a request not to (no penalty listed), from MLIT and ANA.
Watt-hour formula: mAh × rated V ÷ 1,000; MLIT's example is 27,000 mAh × 3.7 V = 99.9 Wh.
ANA spare batteries: up to 20 of 100 Wh or less; up to two of 100–160 Wh, fewer when combined with power banks.
JAL (English page): power banks are not allowed in checked baggage; don't stow them in overhead bins.
We checked the MLIT and ANA pages on 8 October 2026 and read JAL's English page the same day; JAL's Japanese pages could not be read. Check again by 23 October 2026, and before you fly JAL.
Sources for this section: MLIT: new power-bank carriage rules from 24 April 2026 · MLIT: passenger power-bank safety instructions · ANA: international baggage and power-bank handling · ANA: conditional carriage of batteries and power banks · JAL: restricted baggage items
Your next step
1. Turn each power bank over and find "Wh" on the label. If you only see mAh and V, multiply them and divide by 1,000.
2. Keep two at most, each at 160 Wh or less, and match any spare camera or laptop batteries against the combination table above.
3. Put them in your cabin bag with the terminals taped. Once on board, move them to the seat pocket.
Questions about this guide
Can I put a power bank in checked baggage on a flight to Japan?
No. Power banks are banned from checked baggage on flights to, from and within Japan. MLIT's rules say so, and both JAL and ANA state it. Pack them in your cabin bag. Breaking this rule can bring a penalty under Japan's Civil Aeronautics Act.
What Wh limit applies to my power bank for Japan flights?
160 Wh each, and no more than two power banks per person (MLIT rule, from 24 April 2026). To convert, multiply mAh by the cell's rated voltage and divide by 1,000: a 20,000 mAh bank at 3.7 V is 74 Wh. Banks over 100 Wh reduce how many other large spare batteries you can bring (see the table above).
Can I use or charge a power bank during the flight?
You can't charge the power bank itself: plugging it into the seat socket is banned. Using it to charge your phone is something MLIT and ANA ask you not to do, rather than a legal ban. Charge devices from the seat socket instead, and keep the bank in the seat pocket, not the overhead bin. If you're flying JAL, check JAL's own page before you fly.
What if my Japan itinerary uses more than one airline?
Pack to the strictest airline on your ticket. The MLIT rule follows an emergency change to the international (ICAO) standard, approved on 27 March 2026. So two power banks of up to 160 Wh each, cabin only, no charging the bank on board, is now the common baseline, and some airlines go further. Check the operating airline shown on each boarding pass, not the airline you booked with.
Official pages for this guide
The rules in this guide come from the official pages below. Japan, Booked. does not book or submit requests on your behalf.
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Sources and how this guide was checked
Published · Based on official sources · no affiliate links
Official sources
These official sources explain the rules and conditions used in this guide. Live availability and your own booking, admission or service outcome still need to be confirmed for your trip.
- MLIT: new power-bank carriage rules from 24 April 2026
What this confirms: Japan’s Ministry of Land, Infrastructure, Transport and Tourism (MLIT) limits each passenger to two power banks, each rated at 160 Wh or less. Recharging a power bank during flight is prohibited, and passengers are asked not to use it to charge devices onboard. Where an airline's rule is stricter, MLIT's leaflet says to follow it.
Last checked - JAL: restricted baggage items
What this confirms: JAL’s checked English guidance keeps power banks out of checked baggage and asks passengers to keep them within sight rather than in an overhead bin. The recorded review did not establish a January 2027 capacity change or JAL’s rule on charging another device.
Last checked - ANA: international baggage and power-bank handling
What this confirms: ANA says power banks cannot be checked, sets a two-item and 160 Wh carry-on limit for its group-operated flights, prohibits charging the bank onboard and asks passengers to refrain from charging other devices with it. Other operators may apply different rules.
Last checked - MLIT: passenger power-bank safety instructions
What this confirms: The passenger leaflet (別紙1) gives the watt-hour formula with the example 27,000 mAh × 3.7 V = 99.9 Wh, distinguishes the prohibition on charging a power bank onboard from the request not to charge another device from it, says breaking rules 1–3, 5 and 6 can bring penalties under the Civil Aeronautics Act, and instructs terminal isolation and storage within reach rather than in overhead bins.
Last checked - ANA: conditional carriage of batteries and power banks
What this confirms: ANA distinguishes power banks from other spare batteries, allows up to 20 spare batteries of 100 Wh or less and up to two of 100–160 Wh, and reduces that count when power banks over 100 Wh are carried; check the actual item and operating carrier.
Last checked
About this guide
Check each airline's current rules for carrying and using power banks in-flight, keeping 2026 guidelines distinct from potential future changes.
This guide can't give you a live quote, hold a booking, or tell you whether you personally qualify or whether something suits your trip.
How we checked this
Sources and limits of this guide
These dated notes clarify what is confirmed by official sources—and what you still need to verify yourself.
If columns are cut off, scroll sideways. Keyboard: focus the table, then use Left/Right Arrow keys.
| Question | What we found | Where it comes from | What this means for your trip |
|---|---|---|---|
| What do the new MLIT power-bank carriage rules starting 24 April 2026 establish? | MLIT limits power banks to two per person at 160 Wh or less each, prohibits checked-baggage carriage and charging the power bank onboard; individual item acceptance and other carriers require their own checks. | MLIT: new power-bank carriage rules from 24 April 2026 | This applies only to the scope stated. |
| What do JAL's restricted baggage guidelines specify? | JAL’s checked English guidance keeps power banks out of checked baggage and asks passengers to keep them within sight rather than in an overhead bin. The recorded review did not establish a January 2027 capacity change or JAL’s rule on charging another device. | JAL: restricted baggage items | This applies only to the scope stated. |
| What do ANA's international rules for baggage and power banks specify? | ANA says power banks cannot be checked, sets a two-item and 160 Wh carry-on limit for its group-operated flights, prohibits charging the bank onboard and asks passengers to refrain from charging other devices with it. Other operators may apply different rules. | ANA: international baggage and power-bank handling | This applies only to the scope stated. |
| How does ANA handle combinations of power banks and other spare batteries? | ANA's baggage rules classify these items separately and cap combinations of spare batteries between 100 Wh and 160 Wh; check each item against your operating airline's policies. | ANA: conditional carriage of batteries and power banks | Count the actual power banks and other spare batteries together where ANA's conditions require it; do not assume acceptance from capacity alone. |
| What does MLIT ask about charging another device from a power bank in flight? | MLIT asks passengers not to charge other electronic devices from a power bank during flights. Official passenger notices treat this advisory separately from the strict ban on charging the power bank itself. | MLIT: passenger power-bank safety instructions | Follow aviation authority guidelines and check your airline's latest policies; handling rules can vary by carrier and should not be assumed as a universal ban. |
| Does published guidance determine the outcome for your specific case? | No. The cited instructions establish specific facts, not a reservation, current capacity, completed transaction or personal suitability. | The cited statements based on official sources above. | Keep missing conditions still unconfirmed and ask the responsible party before committing. |
Based on official sources, linked below.
Guide updates Review overdue
When this guide was checked and what changed
- First published
- Last checked
- Check again by
- What we checked
- MLIT's press release and passenger leaflet and ANA's international and conditional-baggage pages were checked on 8 October 2026, and JAL's English restricted-items page was read the same day. JAL's Japanese pages could not be read, so JAL-specific charging rules are not stated; check the operating airline for every flight.
- Latest update
- : Added a “your situation, what to do” table, using only facts already in this guide. No facts were rechecked, so the review date is unchanged.
The date above reflects when these checks were last run. If an individual source was rechecked later, you’ll see that date next to it below. Other copy edits are listed in the update history.
Who edits this guide
One editor looks after this guide
Japan, Booked. is run and edited from Japan. The same editor checks the Japanese and English sources, writes the traveller-facing guidance and keeps the correction history up to date.
What changed
Update history
- Situation table
Added a “your situation, what to do” table, using only facts already in this guide. No facts were rechecked, so the review date is unchanged.
- Added the Wh table and removed unconfirmed JAL claims
Removed the unconfirmed JAL charging and January 2027 statements, added a watt-hour table, a battery-combination chooser, penalties, key facts and a next step, and rechecked the MLIT and ANA pages and JAL's English page on 8 October 2026.
- Rechecked ministry and ANA power-bank rules
Rechecked the MLIT two-item and 160 Wh limits and ANA onboard charging guidance. The JAL claims were not fully reverified in this check and retain their earlier source dates; confirm operating-carrier rules before travel.
- Official source verification
Updated following rechecks of MLIT, JAL, and ANA power bank rules: clarified the difference between ministry guidance and strict airline in-flight bans, with added details on conditional carry-on allowances.
- Source-reviewed publication
Published an independently reviewed guide with dated primary sources, a clear scope and limitations, and links to help you plan your next steps.
If an operator, organiser or product changes in a way that affects the guide, we check it again sooner. Reader reports help us spot what to investigate, and we verify them against current official information before publishing. Read our update and corrections policy. See every guide's review schedule. Suggest an improvement to this guide.