The Phoenix™ multi-stage battery charger line is microprocessor controlled, delivering fast and accurate charging to lead acid batteries that would otherwise be considered dead. A wide AC input voltage range enables proper delivery of a full three-stage charge.The Phoenix™ is not only an intelligent and economical charging system, but it can also increase the overall life of a battery (up to 50%) through its proprietary power management technology. So much more than a charger, the Phoenix also features a limited lifetime warranty.