How to Use AAA Batteries As AA Batteries

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Last Updated: August 23, 2023

Ever wanted to work a device that needs batteries, but the battery slot is too big for your batteries to fit? Well, here's a way to convert smaller batteries into larger batteries (in this case, converting AAA batteries into AA batteries).

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You will obviously see some extra space in the slot, since the AAA batteries are smaller than AA batteries.^{[3]
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The size of the ball should be the same size of the extra space in your device's battery slot.^{[4]
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The aluminum foil should be on the battery's negative terminal, not the positive.^{[5]
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Your device will be able to work.

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Question

Does it have to be aluminum, or can it be another metal?

Community Answer

It can be certain types of metal, but not all. Aluminum is the best because it can fit into small areas and it's foldable.

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Question

Does this really work? When I tried it with my remote, it turned on and then off again.

Community Answer

You have to make sure that the foil is snug between the battery and the end, tightly wrapped, and the battery isn't loosely attached.

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Question

If I touch the foil while the device is on, will it shock me?

Community Answer

No, it won't shock you. The power in AA/AAA batteries is not enough to shock you.

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Tips

Make sure the foil is on the negative terminal of the battery, or else it won't work.

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Other batteries can also be used.

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Since AAA batteries are smaller than AA batteries, they won't last very long in a device that needs AA batteries.

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