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What Happened To Duracell PowerCheck?
(hackaday.com)
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this post was submitted on 10 Oct 2024
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Well the pros and cons of the multimeter are addresses in the video! He uses a meter on a dead battery and it still shows a deceptively reasonable voltage when not under load. The built-in tester draws more current.
My technique is to use the 10a mode on the multimeter and check the battery. A full AA will do nearly 10 amps and dead ones much less. Careful with larger cells or rechargeables since you might blow the fuse in your meter.
That sounds a little like testing matches "Yes, that one works. I mean: worked."