This is a metal battery holder that holds one D cell battery. This battery holder has two Fahnstock clips for easy connection of any solid wires from 22 AWG up to 14 AWG. This battery holder does not have any specific direction for inserting the battery. You have a choice to decide which end you would want to be positive and may reverse it as needed.
Warning: To prevent battery from overheating and subsequent discharge, turn the Fahnstock clips upward so they are not touching the metal frame.
This simple switch is used by students to make electrical circuits. This quality knife switch is perfect for science projects and electronic experimentation. With its predrilled holes, it can easily be mounted on any wooden surface or project board. Because of the open structure of the switch, you can visually determine if the circuit is closed or open.
**Please note that binding posts may be black and red**
This set contains the essential materials used in construction of a simple electric circuit that can light up a light bulb. It includes a battery holder, switch, lamp holder, light bulb, connecting wires and a wooden board.
Battery Life Test Kit includes essential materials and online instructions to assemble a basic electric circuit to test general purpose alkaline (dry cell) batteries.
Kit includes four battery holders, four lamp holders, 10 light bulbs, mounting board and enough screws.
You can use it to compare the life of AA batteries and record your data and make a bar chart.