"Lumafield has released the results of a new study of lithium-ion batteries that "reveals an enormous gap in quality between brand-name batteries and low-cost cells" that are readily available through online stores including Amazon and Temu. The company used its computed tomography (CT) scanners, capable of peering inside objects in 3D using X-rays, to analyze over 1,000 lithium-ion batteries. It found dangerous manufacturing defects in low-cost and counterfeit batteries that could potentially lead to fires and explosions."
"The study tested 18650 lithium-ion battery cells, which are used in various products including electric toothbrushes, power tools, e-bikes, power banks, and even electric cars. The batteries were purchased from ten different brands: three OEMs, including Samsung and Panasonic, sourced from "highly reviewed, specialized suppliers," three vendors selling rewraps (typically OEM batteries with their plastic outer wrapping replaced) sourced from "specialized battery sites" or the brand's own web stores,"
Lumafield used computed tomography (CT) scanners to analyze more than 1,000 lithium-ion batteries and identified a large quality gap between brand-name and low-cost cells. The company focused on 18650 cells, which power electric toothbrushes, power tools, e-bikes, power banks, and some electric cars. Samples were purchased from ten brands, including OEMs Samsung and Panasonic, rewrap vendors, and several low-cost or counterfeit sellers. The CT scans revealed dangerous manufacturing defects concentrated in low-cost and counterfeit batteries. Such defects could lead to fires and explosions, raising safety concerns for consumers buying inexpensive cells online.
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