X-ray scans reveal the hidden risks of cheap batteries

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• Lyrl@lemmy.dbzer0.com ⁨3⁩ ⁨weeks⁩ ago

  Lumafield scanned 1,054 batteries – around 100 from each brand – and found 33 of them had a serious manufacturing defect known as negative anode overhang. The defect “significantly increases the risk of internal short-circuiting and battery fires” and can reduce the overall life of the battery,” according to Lumafield. All 33 of the batteries with the defects came from the 424 sold by low-cost brands or brands selling counterfeits…

  For two of the counterfeit brands that were reporting impossible specs, the percentage of tested batteries from those brands that were found to have the defect were even higher – upwards of 12 and 15 percent. None of the name brand OEM batteries were found to have any problems…

  Defects like negative anode overhang and bad edge alignment don’t mean an affected battery is guaranteed to explode or catch fire, but they can increase the risk of those incidents occurring, particularly when combined with other factors such as being left in a hot car or an accidental drop causing additional damage.

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• interdimensionalmeme@lemmy.ml ⁨3⁩ ⁨weeks⁩ ago

  “negative anode” ? You mean cathode ? You mean the overhang is “negative” ? So it’s not an overhang then is it , it’s recessed cathode, right ?

  But, other than tell you to buy TRUSTED BRANDS

  Is it actually true ? Are such batteries operating any different other than sending money to companies that don’t pay the lumifield tax ?

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  • B0rax@feddit.org ⁨3⁩ ⁨weeks⁩ ago

    Did you read the article? It explains it.

    The anodes inside each cells should protrude over the cathodes, so that there will not be a short in case something moves unexpectedly (like vibration, etc).

    The cells they have issues with don’t have consistent overhang, sometimes the cathodes protrude. Which could cause a short.

    Under normal circumstances they will operate just fine, but they are not as safe as properly manufactured cells.

    By the way, omitting safety features usually does not affect normal operation. But safety features are there to protect you in case something goes wrong. Like a seat belt or airbags.

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    • interdimensionalmeme@lemmy.ml ⁨3⁩ ⁨weeks⁩ ago

      I mean did they check if that was actually true, like throwing a couple dozen just the “wrong way” against the wall and see if they actually catch on fire or are least internally short ?

      I mean, we can see there is still a lot of space between the end of the foil and the actual casing, how likely is it, in real life, that this would ever actually matter ?

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