•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 batteries including Calcium, Gel AGM, Wet, LiFePO4, lead Acid, etc. Specifications: •Microprocessor Control (CPU): Yes •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 24V 2A 8A 15A 20A 25A 14.6V 29.2V LiFeP04 •Minimum start voltage: 5.0V •Battery range: 6-400Ah •Thermal protect: 65℃±5℃ •Efficiency: App. 85% Package included: •1 x Car Automatic Battery Charger •1 x English User Manual