A lithium-ion battery for a power tool feels extremely hot to the touch and is emitting a strange chemical smell. What does this indicate?

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Multiple choice — select the best answer

AThe battery contacts are just dirty
BImminent thermal runaway failure
CNormal safe operating temperature
DThe battery needs immediate charging
EThe tool has been used too slowly

✓ Correct answer: B. Imminent thermal runaway failure Heat and chemical smells indicate thermal runaway. The battery cells are failing and may catch fire or explode imminently.

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A lithium-ion battery for a power tool feels extremely hot to the touch and is emitting a strange chemical smell. What does this indicate?

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