Know Before You Go: Batteries, power banks and electronic devices on a plane - Newell Pro - Camera Batteries, Chargers, LED lights and more
Can I carry power banks while traveling by plane? - Digital Citizen
Can an airline really make you check in your hand baggage if it's 1cm too big? This question relates to KLM in particular. - Quora
KLM on Twitter: "@C04220053 In case the powerbank has separate batteries, these must be individually protected inside the hand luggage to prevent a short circuit." / Twitter
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Is my power bank allowed on the plane? - Coolblue - anything for a smile