Screw terminals, if using alligator clips you may need to temporarily remove the connector knob. Why I Switched to a D Cell Battery Holder Specification: Product name: Plastic all-copper battery holder Material: plastic Color: blue Weight: about 23g/pc Dimensions: 72x40x50mm/2., 83x1., 57x1., 96 inches (LxWxH) Package includes: 4PCS plastic all-copper battery holders 4 D Cell Battery Holder with PP3 studs Educational Electrical Circuit Kit ZZLZX D-Cell Battery Holder 4PCS 72x40x50 Mm / 2.83x1.57x1.96 Inches Series Or Parallel Physical Science Plastic D Size Battery Case Physics D Battery Holder Brass Terminal Battery Box Suitable for teaching the basic principles of electricity and how simple circuits work. D Cell Battery Connector at Kimberly Clifton blog Application: Ideal for making and breaking individual electrical connection circuits. Design: The battery holder is sturdy and well made, provides stable operation and shows the electrical principle, the screw terminals, the screw-in connection terminals are sturdy for a safe electrical connection.
