Microprocessor control (cpu). • 3-stage automatic charging: • this is a fully automatic battery charger with 3 charge stages. • automatic charging protects . so you can leave including calcium, gel and agm, wet batteries. they may also help restore drained and sulphated batteries. • types of batteries: most types of lead acid batteries including calcium, gel and agm, wet,efb, 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: natural cooling • input voltage: 100-240v ac, 50-60hz • rated output: 6v 2a / 12v 2a • minimum start voltage: 7.0v • battery range: 2ah - 20ah • thermal protect: 65'c+/-5'c • efficiency: app. 85%. • compliant standards: ce, iec60335, en61000, en550