"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.".

(soundbite of les pommes de ma douche's "trompettes de la renommee") transcript provided by npr, copyright npr...

richard lipton, md, director, montefiore headache center; edwin s. lowe professor and vice chairman of neurology, albert einstein college of medicine..