"The batteries for hybrid and all-electric cars are far more powerful and much larger, with some weighing up to around 250 kilograms, or 550 pounds. They also can be the car’s most expensive component, mostly because of the complexity in making them, rather than the value of the materials.Complicating the question of disposal, a large amount of energy remains stored even in partially discharged batteries. These could deliver harmful shocks and pose a serious fire hazard if mishandled." (nytimes.com)

“There is no green car without green recycling,” - well said. Good to see Toyota's initiative to recycle hybrid batteries.

See how this is done through this video: