The Battery Tender® 3 AMP battery charger will fully recharge and then maintain a battery at its proper storage voltage without the damaging effects caused by trickle chargers. At double the output (3 AMPs) than the original Battery Tender® Plus for a quicker recharge on automotive, marine, and powersport batteries. An ideal charger for everyday charging use or long-term storage and maintenance, it is compatible with 6-volt and 12-volt AGM, flooded, and gel batteries. Includes: 3 AMP battery charger and maintainer, ring terminal and alligator clip cables, five year limited warranty, and lifetime customer service. Input: 120VAC @ 60 Hz. Output: 6V or 12V @ 3 AMPs. Reverse polarity protection and spark proof to ensure user safety. Complete four-step charging program (Initialization, Bulk Charge, Absorption Mode, Float Mode).