How to Wire a Computer Fan to a Battery

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    • 1). Set the two lantern batteries side by side. Cut a 5-inch piece of electrical wire. Strip 1/2 of an inch of insulation off of each end. Connect one end of the wire to the negative terminal of battery #1. Connect the other end of the wire to the positive terminal of battery #2.

    • 2). Strip 1/2 of an inch of insulation off of the red and black wires attached to the computer fan. Connect the red computer fan wire to the positive terminal of battery #1. Connect the negative wire of the computer fan to one of the terminals on the switch. Connect the other switch terminal to the negative terminal of battery #2.

    • 3). Turn the switch to the on position. The computer fan should come on.

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