Out of D batteries but have a drawer full of AAs? These clever adapters let you use three AA batteries in place of one D cell. The case holds the AAs in parallel (side-by-side), delivering the right voltage for devices that need D batteries. Comes as a 4-pack, so you can power multiple items. Perfect for flashlights, toys, radios, or any gadget that eats D batteries. Saves money and reduces waste. Made by DSLRKIT. Just pop in the AAs, close the case, and use it like a regular D battery. A smart solution for emergencies, camping, or everyday convenience. Never be caught without power again. Grab this pack and make your AAs do double duty!