Built-in fire extinguisher

This battery has a built-in fire extinguisher

Stanford University researchers have created a way to prevent faulty batteries from catching on fire. The solution involves a failsafe -- in the form of a miniature fire extinguisher -- built directly into Lithium-ion batteries.

Although the team designed the test for large-scale batteries found in electric cars, the same technology could be applied to smaller devices like smartphones in the future.