Lithium-ion batteries revolutionized the world when Sony brought them to the mass market in 1991. Compared to previous rechargeable battery technology, they were lighter, more energy-dense, last ...

A 27-year-old engineer has powered an electric car using a homemade battery pack built out of discarded vapes.

EV batteries rarely fail, but when they do it doesn't have to kill the car. This new video shows that not only can it be cost-effective to replace a battery, but in some cars you can actually upgrade ...