Adapter + 4 batteries A312(1,4V) for MINOX 35 (GT, PE, PL, EL, GL, AL), MINOX (C, EC, ECX, LX, TLX) and ROLLEI - AliExpress
Found a Minox 35 GT in super good condition (just needs a good clean). I adapted the battery compartment to use 4 LR44 cells, that are about the same size of the