Thee problem is lithium-ion batteries, which have become the standard for portable consumerelectronics, including phones, tablets and laptops, because of the power they can pack into asmall package.

问题出在锂离子电池身上，它已成为便携式电子产品的标配，包括手机、平板电脑和手提电脑，因为一块小小的锂离子电池能存储大量电能。

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