Xantrex Truecharge 10 multistage battery chargers are microprocessor controlled for fast and accurate charging of all deep-cycle ?house? batteries. A wide AC input voltage range enables proper delivery of a full three-stage charge, even when charging from less than perfect quality shorepower or generator power. Smart features, such as adjustable temperature compensation and independent settings prevent battery damage due to overcharging and also help extend the life of expensive batteries. All Truecharge battery chargers come with a one year warranty.