The Auto Meter Products 110V BusPro 660 and 220V BusPro 662 AGM Battery optimized multi-station chargers are designed to make overcharge impossible. The flexible BusPro system has six 5-amp transformer stations which can be doubled up for quicker 10-amp charging to save time, or to split out to double the charger's capacity at a lower 2.5-amp charge rate. The charging current provided by each station is also micro-controlled and helps remove sulfation from batteries connected to the BusPro 660 unit.