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"if the battery in a mechanical mod over-discharges and the device doesn't contain enough air holes to allow the battery to vent, there is a risk of explosion."
https://grassfed.us/Ledsinger-sister-of-Camak-from-Norra-Skrvlinge 
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.stephen silberstein, md, director, jefferson university headache center.
.© 2018 cable news network.
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