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Is this battery still safe to use? It has this dark spot all around the bottom : r/electronic_cigarette
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Animal Study Points to Heating Coil Behind Serious Vaping Injuries - Consumer Health News | HealthDay
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Can anyone tell me what these black spots are on my VTC? Is it still safe or shall I throw it out? : r/electronic_cigarette
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Negative post on battery getting black singe marks, is this normal? (3.7 25amp Samsung inr. Dual coils at .3) : r/Vaping
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