Intelligent charger and battery maintenance device 8A, OSRAM BATTERYcharger 908, allows charging 12V and 24V vehicles, including cars and small trucks. 9-stage charging process for lead-acid/AGM batteries, 7-stage charging process for lithium batteries. It includes a digital display for monitoring the charging process and various protections, including reverse polarity and overvoltage protection. Simply connect and be assured that the car charger maintains the car battery, as it automatically switches to maintenance mode with long-term connection when the battery is fully charged.