The Battery Tender Junior is much more than a trickle charger. It has a brain. It’s lightweight, compact, and fully automatic; very easy to use, especially in small spaces. It will keep your battery fully charged so that it is ready to go when you are! Features: -Includes a ring terminal harness that you can leave attached to your battery. -Perfect for all lead-acid, flooded or sealed maintenance free batteries (AGM and gel cell). -Complete 4-step charging program (Initialization, Bulk Charge, Absorption Mode, Float Mode). -Automatically switches to float / maintenance voltage after fully charging the battery. -If the battery voltage drops too far under load, full charger output power resumes. -Solid state two color LED indicates stage of charger. -Spark proof. -Reverse polarity protected. -12′ output cord. -5 year manufacturer warranty.