Consider the many uses for 9-volt, AA and AAA batteries in film, video, photo and theater. Flashlights, light meters, electrical meters, practical lamps, wireless mics, LED lighting and more, all rely on them. That's why it's essential to keep a supply of batteries on hand when on set or prepping for a shoot. BarnDoor Lighting offers long-lasting Duracell ProCell AAA batteries, AA batteries and 9-volt batteries for professional use.