X-ray scans reveal the hidden risks of cheap batteries

Here is a 189-word summary of the news article: Lumafield, a company that uses computed tomography (CT) scanners to analyze products, has released a study on the quality of lithium-ion batteries. The study examined over 1,000 batteries, including those from reputable brands like Samsung and Panasonic, as well as low-cost and counterfeit batteries from online retailers. The findings reveal a significant gap in quality between the name-brand and low-cost batteries. Lumafield found that 33 out of the 424 low-cost or counterfeit batteries had a dangerous manufacturing defect called "negative anode overhang." This defect increases the risk of internal short-circuiting and battery fires. None of the name-brand batteries showed this defect. The study also found that low-cost batteries often exaggerated their specifications, with some claiming capacities over 9,000 mAh when their actual capacities were less than 1,300 mAh. Overall, the results suggest that purchasing devices with batteries from reputable manufacturers can significantly reduce the risk of battery-related safety issues.