At the push of a button, a 7-stage charging cycle is initiated for lithium batteries and a 9-stage cycle for lead-acid/AGM batteries. It features a digital display for easy operation even in low light conditions. For your safety, functions such as reverse polarity protection and overvoltage protection are integrated. Simply connect it and be assured that the charger will maintain your car battery: it automatically switches to long-term maintenance mode once the battery is fully charged.