Smart battery charger and maintainer with multi-stage charging cycleThe OSRAM BatteryCharger 906 is a 6A smart charger and battery maintainer for 6V and 12V vehicles including most vehicles and vans. 7 stage charging cycle at the touch of a button for Lithium batteries, with only a 9-stage cycle of Lead Acid/AGM batteries. Includes a digital display to make the charging process easier and a host of safety features including reverse polarity and short-circuit protection. Be sure that the charger is maintaining your car battery as it automatically changes to long-term maintenance mode when the car battery has been fully charged.