"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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olivia mitchell: i think so. i mean, fresh and local is, you know, what they say is - tends to be healthier..
"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."