Question about the Lester Dine Ring flash
The battery compartment is located just above where it says "Dine Auto-Macro-Light" on the body of the flash unit (see photo #3). Rotate upward the upper section of the flash unit as if you were adjusting a typical flash for bouncing the light off of the ceiling. Then use your thumbs to slide upward that the section of the unit above where it says "Dine Auto-Macro-Light." The unit takes four AA batteries.