In the summer of 2016, news began to break about the Samsung Galaxy Note 7 smartphones catching fire.  A large recall ensued and Samsung permanently ended production of the phone.  An investigation completed by a team of 700 engineers and researchers, that included 200,000 devices and more than 30,000 batteries determined that a deformity existed with one of the two types of lithium-ion (Li-ion) batteries.

This deformity caused the electrodes inside the battery to bend and then start on fire. You can purchase 18650 lithium ion battery via online sources.

In August 2016, there was a fire in Franklin, WI at S&C Electric Company started by these batteries. The fire department put water and foam on the fire but could not extinguish it. They had to call in firefighters from the airport to use a special liquid that helped extinguish the fire.

Lithium-ion batteries are used in many ways, including cell phones, laptops, children's toys, vehicles and vape pen (e-cigarette). They are inexpensive, strong and lightweight yet they also produce large amounts of energy that can cause a risk of fire and explosion.

Lithium-ion battery that is capable of spontaneous ignition and subsequent explosion due to overheating. Overheating can result from electric shock, rapid discharge, and overcharging, poor design or manufacture defect.

When the lithium-ion batteries are stored, they should be stored between -20 to 60 degrees Celsius and should be stored at partial cost 30-50%. If they are stored for a long time, they will need to be charged every few months.