Currently untested, will be updated once manufactured and working!
This board should substitute the function of the boost converter board of the Pokemon Mini originally manufactured by Alps. As opposed to the original switching converter which was made with discrete components this one is based around TLV61220 which integrates everything except the capacitors and inductor.
It is responsible for stepping up the ~1.5 V of the AA battery to 3.0 V (or 3.3?).
I still haven't figured out exactly how it is integrated into the circuit hence there are some jumpers to be configured.