Battery charger with a 6 or 12 volt operation, power indicator light, automatic shutoff switch that prevents overcharging and is compact and easy to store. The leads on this charger stay permanently affixed to the battery terminals. It plugs into a 110 volt outlet and and can also be used for car, boat, snowmobile or jet ski batteries as well! Why pay $40 for a so-called "Tender" that does the same thing? See FAQ10. Click for Suggested Use.