About this item: *Microprocessor control(CPU). *7-STAGE AUTOMATIC CHARGING:*This is a fully automatic battery charger with 7 charge stages."Automatic charging protects your battery from being overchargedSo you can leave the charger connected to the battery indefinitely. *7-stage chargers are suitable for most battery types including calciumGel AGM,LiFePo4,Wet ,lead Acid batteries .They may also help restoredrained and sulphated batteries. *Types of batteries : For most battery types including Calcium,Gel AGM,WetLead Acid ,LifePo4 ,etc.. Specification: .Switch mode technology : Yes .Polarity protection :Yes *Output short protection : Yes *Over voltage protection :Yes *Over temperature protection : Yes *Cooling :Fan *Input voltage:100-240VAC,50-60HZ *Rated output :12V10A/24V 5A.