The powerful STIHL AL 301-4 Multi-Charger can sequentially charge up to four AP or AR STIHL batteries. This Charger helps professionals stay powered up and working all day long. It can charge up to four AP 300 S batteries in just under five hours - ideal for charging batteries overnight in a workshop or on the go (as it is approved for mobile use.) This Multi-Charger is easy to operate with LED indicator lights displaying the charging states of all Batteries and indicating if they are too hot or cold for use. The AL 301-4 uses a reduced amount of energy that enables plugging in up to three chargers on a single 6.5A/ 230V circuit. Charging time per Battery AP 200: 55 minutes, or to charge it up to 80%, it takes 40 minutes AP 300 S: 70 minutes, or to charge it up to 80%, it takes 55 minutes AR 2000 L: 270 minutes, or to charge it up to 80%, it takes 210 minutes AR 3000 L: 400 minutes, or to charge it up to 80%, it takes 310 minutes NOTE: The AP adapter and Connecting Cable (both sold separately) are required for charging the AR 2000 L and AR 3000 L Backpack Batteries.