Microprocessor Control (CPU). 7-STAGE AUTOMATIC CHARGING: This is a fully automatic battery charger with 7 charge stages. Automatic charging protects your battery from being overcharged. So you can leave the charger connected to the battery indefinitely. 7-stage chargers are suitable for most battery types including Calcium, Gel AGM, Wet,LiFePO4, lead Acid batteries. They may also help restore drained and sulphated batteries. Types of batteries: Most types of lead acid batteries including Calcium, Gel AGM, Wet, LiFePO4,lead Acid, etc.. Switchmode technology: Yes Polarity protection: Yes Output short protection: Yes Non battery link protection: Yes Over voltage protection: Yes Over temperature protection: Yes Cooling: Fan Input voltage: 100-240V AC, 50-60Hz Rated output: 12V 20A , 24V 10A Minimum start voltage: 5.0V Battery range: 6-300Ah Thermal protect: 65'C+/-5'C Efficiency: App. 85%. Compliant standards: CE, UKCA, FCC Dimension (L×W×H): 192×102×165mm Net Weight: 955g 彩盒尺寸:210*183*105mm, 單臺重量: 1.22KG, 16臺一箱,外箱尺寸:445*385*450mm, 毛重:21.2KG