K&F CONCEPT 2-Pack NP-W126 Battery, USB C NP-W126S XT30III Battery Compatible with Fujifilm X100vi, X100V, XM5, XE5, XT30II, XT30, X Half, XS10, XT20, XE4, A5 Cameras

FYI I picked up this set of 2 batteries from Amazon and they've been amazing cause they have a built-in USB-C port right on the battery – no charger needed. I leave my official Fuji battery at home most of the time along with the bulky battery charger. I haven't done a direct runtime comparison but I shot all over Japan on 2 batteries and never felt like I even needed a third.