Uhh resistors do not step up , that requires a boost regulator circuit FYI . '
I wanted to do a boost design and tested several most did not work ( my fault ) and they do not have the best efficiency vs. a Buck regulator like the BP and IP use. If I can find a REAL 300mah battery it will get 1/2 the time of the BP or IP and for the size that is good enough for this design IMO.
I actually had regulator, but changed it because it didn't sound right. Understand, at 40, I'm a ways away from when I played with most of this. ;-)