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If you don’t want to go through the hassle of putting batteries in your electronics to test them out, then you’ll want to try this easy trick to help tell whether a battery is still good or bad. I was a little dubious at first so I took some batteries I knew were both good and bad and tested them using this trick to see how accurate it was. I was surprised to see that 85% of the time this trick worked in predicting whether a battery is good or bad. What’s the trick? Check out the video below to see an example:

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