AA battery is in a treat for the eyes!

with only one battery Aa one has a light output of the highest order. And the maximum zoom position gives a fun square shape corresponding to the emitting diode that surprises everyone. But this square shape allows good fit with a camera or camcorder with lighting where the target area is uniformly illuminated. Useful when you have no battery in the extra light from a camcorder or that energy is insufficient for a flash picture.
Which confers a good purchase value Hours of Operation at the limit of the divine!