Battery Tender Junior (12V) 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! and 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.