Welcome to our shop! This item is a set of 4pcs professional and practical battery adapter converter cases. It is specially designed to convert any size AA battery into a size D battery for use. Simply put 2 AA batteries into the converter, and it will function the same as a D-size battery. Made of environmental material, these converter cases are harmless to your health. They have a small size and are easy to carry. The converter cases have fine workmanship and can convert 2xAA batteries into 1xD battery. They are also of large strength and strong toughness. The battery limit slot ensures that the battery is fixed in a good place. These converter cases are perfect for electronics and emergency situations. They are suitable for converting any size AA battery to a size D battery. Specifications: - Weight: 43g - Quantity: 4 - Material: Durable hard plastic - Color: Translucent white Please note that the color may be slightly different due to monitors. The package includes 4 battery converter cases. 100% Satisfaction: Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactory after-sales service.