He used old batteries, but I actually had new Duracell batteries with this feature very recently, in 2022 or so (Germany).
this post was submitted on 10 Oct 2024
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You could’ve saved him so much movie magic!
Does anyone remember the battery testers that were built into the packaging? I think they were based on the same concept.
They are mentioned in the video.
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It never went away. I have a duracell battery with power check sitting next to me on my desk
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It failed often enough that it wasn't all that useful. A cheap battery tester is better. And for 9volts you can also use the tongue test, lol (don't really though). My grandfather used to do that all the time.
What's wrong with the tongue test for 9 volts? I know it tickles some but is it actually harmful? I've been doing that for over 30 years...
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