Is a 27,000mAh Power Bank Allowed on a Plane? Check the Wh Label
A 27,000mAh power bank can sit near 100Wh, but mAh alone is not enough. Check the printed Wh label and your operating airline before flying.
Source-checked pre-flight decisions
Check the rules before you pack
Compare the total cost of two London airport options, compare two fares, get a route-aware answer for airport liquids and laptops, calculate whether a power bank can fly, or check carry-on and checked-bag rules for commonly questioned items. Every tool shows its scope, conditions and official sources.
Trip-cost calculator
London Airport Total Cost
Compare fares, unavoidable extras, ground quotes and time for two London airport options.
Compare airport options →
Fare checker
Flight Fare Decision Checker
Compare the fares you already found and see which one is actually cheaper after the bags and seats you need.
Compare two fares →
Route checker
Airport Security Rules
Compare liquid, laptop and reusable-bottle rules across departure, connection and return checkpoints.
Check your airports →
Battery checker
Power Bank Flight Rules
Convert capacity to watt-hours and compare cabin, quantity, approval and onboard-use limits.
Check a power bank →
Packing checker
Can I Bring It?
See separate carry-on and checked-bag decisions for vapes, razors, medicine and other high-question items.
Check an item →
Why use a checker? Airport, airline and aviation rules can differ by checkpoint, carrier, item and date. PrismGist links the evidence and keeps uncertain cases conditional.
Latest source-checked guides
Can You Use a Power Bank on a Plane? Ryanair vs easyJet 2026 Rules
Carrying a power bank and using it onboard are different questions. Compare Ryanair and easyJet’s current charging and in-flight-use rules.
Can You Take a 20,000mAh Power Bank on easyJet in 2026?
A typical 20,000mAh power bank is about 74Wh. Check easyJet’s current two-bank, cabin-only and no-use-onboard rules before you fly.
Can You Take a 20,000mAh Power Bank on Ryanair in 2026?
A 20,000mAh power bank is often about 74Wh at 3.7V, but Ryanair also limits quantity, storage and onboard use. Check the current 2026 rules.
Ryanair Basic vs Regular: Which Is Actually Cheaper After Bags and Seats?
Is Ryanair Regular worth the extra cost? Compare Basic and Regular fare bags, seats and Priority, then test the break-even point with your own booking prices.
Why OpenAI Slowed Astra: What “Critical” Cyber Capability Actually Means
Why OpenAI slowed Astra in August, what its September Critical assessment changed, and how safeguards differ from product access and incident attribution.
Stansted Liquid Rules 2026: 100ml, Bags and Laptops
Stansted still limits liquid containers to 100ml, not 2 litres. Check what stays packed, labelled-bottle rules and your return-airport restrictions.
Gatwick Airport Liquid Rules 2026: 2 Litres, Metal Bottles and Laptops
Gatwick allows liquid containers up to 2 litres and laptops to stay packed, but metal or insulated bottles must be empty. Check the current rules.
Manchester Airport Liquid Rules 2026: 100ml, Bags and Laptops
Manchester Airport still limits cabin liquids to 100ml containers, but new scanners let liquids, laptops and tablets stay packed in your hand luggage.