"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://oakley-sunglassesformen.us/Lefeber-sister-of-Klacic-from-Rodeberg?Lessinson=244
"in contrast, a mechanical mod is unregulated and works simply by drawing the power of a battery to an atomizer," he said. ..
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