What are the differences between i-type film and 600 film?

i-Type film is specifically designed for use with Polaroid's i-Type cameras, which do not have a built-in battery like the 600 series cameras. i-Type film is slightly cheaper than 600 film because it does not contain a battery. 600 film, on the other hand, is compatible with both 600 series cameras and i-Type cameras, as it has a built-in battery to power the camera's functions.