TESSAN Universal Travel Adapter 28W, International Power Adapter with 3 USB C 2 USB A Charging Ports, Worldwide Plug Adaptor for US to European UK Italy Ireland New Zealand (Type C G A I)

Or one of those wall warts that plugs in and has both usb-a and usb-c. This one worked well for our recent 6-day(!) train trip. https://www.amazon.com/dp/B0B2PD7VW4?ref=ppx_pop_dt_b_asin_title&th=1 Bring some gaffers tape or duct tape, as sometimes the plugs don’t hold very well. The tape is also useful for blocking air that’s too cold, fixing rattles, etc.