Is the Anker Anker Prime Power Bank (20K, 220W) allowed on United Airlines flights from Japan?
Short answer: Allowed. Below is the citation-backed reasoning, the specific conditions if any, and what to do at security.
Ruleset age warning: This ruleset is 32 days old. Battery rules can change quickly; re-check close to departure before treating this verdict as current.
Last reviewed
May 15, 2026
Ruleset
2026-05-15
Sources checked
3
Verdict source gate
passed
Verdictvdt_ZS8HXB1SYM0KR0674Q365X1MV7
Allowed
72.36WhAnker Anker Prime Power Bank (20K, 220W)
Allowed in carry-on. Final decision rests with airline and security staff.
Operating carrier policy context
United Airlines UA
Confidence
Airline official
United is tracked from its official dangerous-items page; US departures also apply TSA/FAA carry-on-only handling for spare lithium batteries and power banks.
Source tier: officialchecked: 2026-05-31
Key constraints
Quantity
No United-specific power-bank quantity rule is active in the current ruleset.
Watt-hour limit
Baseline model: up to 100 Wh normally allowed; over 160 Wh banned on passenger aircraft.
Carry-on
Allowed when within capacity, label, and recall rules.
Checked baggage
Not allowed for spare lithium batteries and power banks.
“From April 24, 2026, MLIT tells passengers not to put power banks in checked baggage, to carry them on board, keep them to 160 Wh or less, protect each power bank against short circuits, avoid overhead compartments, carry up to two per passenger, and not charge or use power banks during flight.”
“United is tracked from its official dangerous-items page; US departures also apply TSA/FAA carry-on-only handling for spare lithium batteries and power banks.”
Global source-monitor health is tracked on the compliance page; this verdict page only shows the citations actually used for this answer.
Citation freshness: The weakest source freshness is 32 days old against a 30-day regulator SLA; re-check close to departure before relying on this verdict.
Why this verdict
CertiWatt evaluates the product capacity, departure jurisdiction, operating carrier, published dangerous-goods policy, and active recall evidence before returning a verdict.
Decisive rule
Allowed in carry-on. Final decision rests with airline and security staff.
No active model-specific recall matched this verdict.
status: not_affected
Citation freshness
3 sources checked
Oldest cited source: May 15, 2026
Capacity evidence for this model
Auxiliary calculation
72.36 Wh · Manufacturer-stated Wh
Threshold comparison
27.64 Wh below the passenger power-bank 100 Wh limit. The printed Wh label still takes precedence over mAh estimates.
Route-specific signals
These page-specific checks make this verdict about this model, this departure country, and this airline, not a generic power-bank answer.
Anker Anker Prime Power Bank (20K, 220W) is recorded at 72.36 Wh and 20100 mAh, so the capacity check is tied to this exact catalog model.
Japan is evaluated as the departure jurisdiction for country-specific power-bank overlays.
United Airlines (UA) is evaluated as the operating carrier, with its published dangerous-goods policy included in the citation set.
Anker Anker Prime Power Bank (20K, 220W) has no active recall link in this catalog record, so the verdict is driven by capacity, route, airline, label, and rule evidence.
Allowed in carry-on. Final decision rests with airline and security staff.
Rules applied
jp.mlit.2026.power-bank-cabin-controls
iata.passenger-guidance.power-bank-threshold.2026
About the Anker Anker Prime Power Bank (20K, 220W)
Capacity
20100 mAh
Watt-hours
72.36 Wh
Voltage
3.6 V
Certifications
What to prepare before security
Keep the power bank in cabin baggage only, never checked baggage.
Make sure the Wh or mAh label is readable, or keep the manufacturer specification page available.
Use the linked citations below if staff ask why the device was flagged.
The verdict above is for the standard Anker Anker Prime Power Bank (20K, 220W). If your unit has a different serial number range — especially for recalled models — verify directly:
Informational only. Final decision rests with airline and security staff. Why we said this.
All public source records used by CertiWatt are listed in the source registry. Sources.
Common questions for this exact trip
Is this a guarantee at the airport?
No. This is an informational verdict based on published sources. Airline and security staff retain final authority.
Why can the same power bank get different answers by country or airline?
Power-bank rules combine global battery limits with country overlays, airline policies, storage rules, and recall notices.
When should I re-check this route?
Re-check close to departure, especially when the trip involves China, Thailand, Korea, a recalled model, or a battery near a capacity limit.