Why does it have to be 26650?
That is a dying size, not many flashlights have them these days.
But cheap, USB, good → F82 → LED-Taschenlampe, hohe Leistung, USB wiederaufladbar, 8 x XPG-Perlen, Laterne, Schwanz, Magnet-Clip, Taschenlampe, wasserdicht, tragbar, Mini-Beleuchtungslampe - AliExpress 39
From my THread about cheap lights: I bought a bunch of cheap flashlights from AliExpress - Thoughts
Or if you want a thrower: Starkes Licht Outdoor-Multifunktions-Ladegerät Taschenlampe Lithium-Batterie aufladen wasserdichte Beleuchtung Nachtlichter - AliExpress 39