Check the listing for details. 2pcs iSmartHome 3D Printed AA to Size D Battery Adapters, Introductory Special. Condition: New. Listed at 2.39 USD. This is the Introductory Special. Original price $4.39 AA size battery is popular and widely used. AA size rechargeable battery is much cheaper then D size rechargeable battery. Sometimes we may need D size battery but it is not worth to go out and buy a new D size battery. This AA to size D battery adapter could be used for these situations. The cool AA to Size D Battery Adapters are built with the 3D printing technology.Material: ABS plastic Battery is not included. The battery showing in the photo is used as an example to compare the size of the adapter. Plastic adapters and braze screws are included. The listing are for 2 pieces of the battery adapters. Please tell me which color you choose. You could choose from RED, ORANGE, BLUE, WHITE. If you need more battery adapters then the available quantity here, please contact me to start new building process on demand. Build on demand is one of the benefits of using 3D printing. Please watch the YouTube video for part of the 3D printing build process for the AA to Size D Battery Adapter to have some knowledge of the 3D printing The build time is more then 30 minutes for each AA to size D battery adapter.