These are 10pcs D-Cell battery holders, which are used for series connections. Series connections allow you to increase voltage by adding additional cells. If you use a single battery holder, you will get roughly 1.5 volts. By interlocking multiple battery holders tops to bottom, you will increase your voltage by roughly 1.5 volts for every battery you add to the configuration.

Features
- Color: Black.
- Material: Plastic, copper.
- Size: 7.00X4.00X5.00cm/2.75X1.57X1.97 inch.
- This is great for home school making and breaking a single electrical connection circuit experiments.

- Good for teaching basic principles of electricity and how a simple circuit works. These are great for demos and project.
- Easy to use and great learning tool for kids. Practicing on an education model would definitely great for any student.
- Battery holder provides stability in handling and visualization of electrical principles, screw type binding post ,screw down connection terminals are heavy duty, for secure electrical connection.
- Adopts precision production to enhance the stable characteristics and high reliability.
Package Including

10 x battery holders