Introduction
We often have piles of CR2032 coin cell batteries around, and it's always a pain to figure out which ones are good or not. That's why we've made this simple coin cell battery holder tester using a red LED, some Maker Tape, and a clothespin.
Video Overview
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The long leg of your LED is the Positive leg.
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Bend it in half and then outward.
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Bend the short leg outward. Don't bend it in half.
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Open up your clothespin and apply tape on the flat inside area.
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Go around the lip.
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Cover the bent, Positive leg, of your LED.
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Cover the Negative leg of your LED with tape.
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Go around the backside of the clothespin and to the bottom.
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End on the other flat inside area.
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Don't over-complicate things on the back (inside V area) part where you press together. We like to go inside a bit with some tape to make it look clean, but as long as it works when you're finished... it won't matter.
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Put a battery in and see if it works.
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If it doesn't work flip the battery over and try again. You may have reversed your LED legs.
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