optimizing battery span can be quite difficult, but not impossible
even when the screen is 'fully' off, the boost converter to 13V for the screen power still runs, making the total amount of consumed current about 100mA (when screen is fully black)
so the only solution is to include a hardware switch which can power the screen fully down (sadly this also affects the microSD slot).
same concept is going to be applied to the bluetooth to save more battery. :)
so basically: Atomsoft and i are getting pretty close to a final schematic for the whole thing.
with current software optimizations, the 1400mah lipo battery can now last up to 24 hours till it reaches 3,3V (3,7V is recommended lowest level, so 3,3V is danger)
and more functionality will be added very soon to the code, allowing for more graphic commands, accelerometer readings and such!
also, the website home will undergo some slight changes, with links to this hackaday project and such :)
and if that isn't enough for this update: the 3D case design is getting along pretty neatly, the dimensions are 50*31*9mm as of now. (including strap connectors)
and without strap connectors: 42*41*9mm