Ty.
I bought a " IZOKEE Redesign Pro Mini ATMEGA328P 3.3V 8MHz Module Development Board Microcontroller for Arduino (3X 3.3V 8MHz)"
So it seems like it should work with the 3.7 LiPo battery I got. ( I thought that the 3.3 V was referring to the logic level or something)
( A spark fun datasheet said that these have built in regulators; so i wont worry about the need to solder a regulator )
Ty