Used vehicle batteries and other secondhand lead-acid batteries are dangerous garbage and should be properly disposed of through recycling process. Lead-acid batteries are used in a variety of applications, including emergency lighting, air conditioners motorcycles and boats. Battery recycling is excellent for the environment and future generations. Battery recycling is the practice of reusing or recycling used or abandoned batteries that would otherwise be considered garbage and damaging to the environment. Current battery recycling technologies consume a lot of energy. It takes six to ten times as much energy to reclaim metals from discarded batteries as it does to retrieve metals from other sources. Batteries include a variety of metals that can be reprocessed as secondary raw materials. Most lead, nickel-cadmium, nickel hydride, and mercury batteries may be recycled using well-established techniques.