quick chager - Battery Chargers are devices which is used to input electrical energy into another electrical cell, or rechargeable battery. A battery charger will do this by pushing an electric current through it. Various types of rechargeable batteries will require different charge currents, which are supplied from the battery charger, therefore many different kinds of battery chargers are manufactured to supply this need. For example a battery from a motorcycle, will require a different current than a mobile phone battery.