1、Can convert any size AA battery to a size D battery. Option to use 1 AA,2 AA or use 3 AA for more capacity 2、Fine workmanship, standby specification, 3 x AA battery can be converted into 1 x D battery 3、Large strength and strong toughness 4、Small size, easy to carry. Perfect for electronics and emergency situations 5、Made of environmental material, harmless to your health Description: The item is a set of 4pcs battery adapter converter cases, which are specially used to connect three AA batteries together for replacing a large D battery. It is perfect for electronics and emergency situations. Features: 1. Made of environmental material, harmless to your health. 2. Small size, easy to carry. 3. Large strength and strong toughness. 4. Perfect for electronics and emergency situations. 5. Fine workmanship, standby specification, 3 x AA battery can be converted into 1 x D battery. Specifications: Size: 6 x 3.3cm / 2.36 x 1.3inch Quantity: 4 Material: ABS Color: White Package Weight: 81g Function: Convert 3 AA battery to a D battery Attention: Size may be slight inaccuracy due to different batches of the products, or hand measurement. Color may be little different due to monitors. Please take real product as standard, thanks for your understanding! Package included: 4 x Battery Holder Converters