Battery Tender Jr. 750ma fully automatic smart charger with LED charge mode indicator. Polarity protected with a spark proof saftey feature. Brings battery to full 14.4 volts, then maintains a float charge at 13.2 volts. When voltage drops below 12.6 volts full charge is resumed until battery again reaches 14.4, Perfect for maintenance free and conventional lead acid batterys. Charger unit plugs into wall, includes 12 foot cord with both clip and ring terminal battery connections. Convenient way to maintain your battery, plug it in and forget about it until you're ready to ride. Extra battery charger harnesses (with ring terminals and quick disconnect plugs) are available so you can equip all your bikes, allowing you to simply plug this charger into each bike without accessing the battery compartment.