Can travel adapters go in a suitcase? Devices like power banks with lithium batteries (must be capped at 27,000 mAh) must go in hand luggage, not checked bags. Can I buy travel adapters at the airport? Do hotels have travel adapters? Some hotels have travel adapters, and some even have outlets for other countries (or USB-A and USB-C ports), but most do not, so don’t bank on it.