Despite its popularity, lithium safety has been one of the concerns for users and manufacturers across the world. These safety issues are largely due to instability and extreme sensitivity at high temperatures. Inadequate quality, flawed battery design, physical abuse, and improper discharging and charging are some leading causes of rapid explosion and fire in these batteries. Nowadays, lithium batteries and lithium-ion batteries are designed with some safety measures such as pressure-relief devices and positive temperature coefficient (PTC) resistors, which act as a fuse.