•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. Specifications: • 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℃+/-5℃ • Efficiency: App. 85% • Dimension (LxWxH): 192x102x165mm Package included: •1 x Battery Charger •1 x English User Manual