. . former novartis exec to lead cambridge diabetes startup semma . . september 2015 (21) . january 2014 (16) ."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." . please keep our community civil. comments should remain on topic and be respectful. . https://grassfed.us/Nathan-sister-of-President-from-Toronto . . . advertisement .