A majority of the mods that explode have been discovered to be mechanical mods. The mods typically come with either little or no safety measures. With no protection measures in place, a little misuse of mechanical mods can result in explosions. Common causes of explosion of mechanical mods include:
 - Recharging an over drained battery
 - Battery faults resulting from damaged wrappers
 - Faulty rebuildable atomizers as a result of loosening leads
 - A significant reduction in the resistance of the atomizer that causes the battery to be over-stressed.
It is advisable to buy mechanical mods only if you understand the risks and know how to minimize the dangers.