How to watch: Crazy Old Lady will debut on Shudder on Feb. 27.
But e-bikes containing lithium-ion batteries are a newer challenge. "When a battery fails, it doesn't necessarily ignite, it will often produce some off-gases," says Stephen Welch, senior lecturer at the University of Edinburgh's Fire Research Centre. "Those off-gases are toxic and flammable. If they accumulate, you can have an explosion risk."，更多细节参见91视频
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In 2025, there were more than 30,000 applicants for 10,000 of these jobs - some from abroad.