Description:1. Lithium, Lead-acid, LiFePO4 battery type can be selectable.2. Fully automatic microprocessor control. 7-stage charging processprovides the best possible and efficient battery charging.3. Charging voltage adapts to temperature to prevent over- or under-charging of battery .4. Can repair old and idle batteries.5. With reverse polarity protection, short circuit protection, over-charge protection, sparks free contact .6. With LCD screen showing voltage, current, battery power, temperature etc .Specification: AC input 100-240 V 50/60Hz Output voltage 12 V / 24 V Output current 12V20A & 24V10A No-load output voltage 27.6V Minimum starting voltage >7.0V Power and load MAX 240W Size 158 x90x50mm(6.22 x3.54 x1.97 inches) Suit for Lithium/LiFePO4/Lead-Acid (AGM,GEL,EFB, MF, FLOODED, VRLA, SLA and Wet batteries..) Package Included: 1X 20A Car Battery Charger 1X 3M Extension Power Cord 1X Cable Clip 1X Manual 1X Retail Box