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by Kailash NR

Introduction

A quick primer on how to connect two AA batteries together to make a 3-volt power source for powering various projects and experiments.

    • Scissors have functional sharp edges. Contact may result in injury. Always keep blades away from fingers and body. Handle with care.

    • Please realize that batteries might cause damages like leaking, fire or explode when misused or defective. Refrain from mechanically damaging them.

    • Be careful not to short the terminals of the batteries.

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  1. As you may already know, a battery has two terminals - a positive (+) and a negative (-). On a AA Battery, the positive is indicated by a nub on one side. While the other flat side is the negative.
    • As you may already know, a battery has two terminals - a positive (+) and a negative (-). On a AA Battery, the positive is indicated by a nub on one side. While the other flat side is the negative.

    • Stretch the elastic band over each battery from positive side to negative side.

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    • Insert a safety pin (head-first) in between the battery and the elastic band. This pin should be inserted near the positive side of the battery.

    • Pull the safety pin along the battery till the head sits flat on the positive nub. Take care that the pin doesn't slip out from under the elastic band.

    • You should end up with a battery with the safety pin sticking out from the positive end.

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    • Insert the battery assembly into the space between the elastic band and the other cell (in the elastic band). This time towards the negative end.

    • Drag up the cell so that the safety pin is flat on the negative terminal as well.

    • You should end up with two cells connected positive to negative by the safety pin and two free terminals.

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    • Now insert one of the safety pins in between the free positive terminal and the elastic band.

    • Now insert a safety pin under the elastic band over the free negative terminal as well. You will end up with two safety pins sticking out in opposite directions, one being positive and the other negative.

    • Now, use the scissors to cut the ice cream sticks into two lengths of 3.5 - 4 cms each.

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    • Insert one of the ice cream stick pieces in between the elastic bands and across both cells.

    • Use the other piece to secure the other side.

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    • Our battery holder is now finished! You can test its functionality by attaching an LED across the safety pins.

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    • Here is a circuit diagram of the holder. We are connecting the batteries in series for at total of 3 volts.

    • If the battery holder refuses to light an led, check the contact between the pins and battery terminals. Also check the tension on the elastic bands and add spacers with ice cream stick pieces.

    • Be careful not to short the terminals of the batteries. If the batteries heat up while in the holder, this cloud indicate an electrical short circuit. Remove the batteries and check your connections.

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Finish Line

Kailash NR

Member since: 05/02/2017

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67 Guides authored

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