I just received mine and the long Rofis protected 26650’s fit just fine. Can use 18650 also.
My Samsung 21700 40T & 50E also just do fit.
2A output, only 1A input though (actually I’m showing 1.55A charging 2ea 26650’s)
will charge my low power devices, no problem (TIP, TINI, bluetooth earpieces, MP3 players)