If you have a lead-acide, flooded, or sealed maintenance free battery (AGM and gel cell), you will definitely be pleased with the Battery Tender Plus! 1.25 amp battery charger fully charges a battery and maintains it at a proper storage voltage without damaging effects. A quick connect ring terminal harness is included for those hard to reach places and charger also comes with alligator clips for an alternate connection.; 12 volt Ensures optimum charge voltage according to ambient temperature Switches from full charge to float charging mode automatically Reverse polarity protection to ensure safety and the red and green lights alternately flash in this condition Complete 4-step charging program (initialization, bulk charge, absorption mode, float mode) Safety timer is 72 hours Keep the battery connected at all times when it's not in use and it will always be ready to go when you need it 10-year warranty