The Kramp ARTIC 4000 is a versatile 12V automatic battery charger designed for optimal maintenance of lead-acid (GEL, AGM, liquid, calcium) and lithium (LiFePO4) batteries. With a 4A output current, this charger is suitable for batteries ranging from 1.2 Ah to 70 Ah, and up to 130 Ah for maintenance charging. It features an advanced 8-step charging curve for lead-acid batteries and a specific 7-step curve for lithium batteries, ensuring efficient and safe charging. The ARTIC 4000 includes a 'Supply' mode for maintaining vehicle electronics during battery changes and a 'Refresh' mode to restore deeply discharged batteries. Its compact, lightweight, and waterproof design (IP65) makes it durable and easy to use in various conditions. Equipped with protection against short circuits, polarity reversal, and overvoltage, it ensures safe operation. Ideal for cars, motorcycles, and other vehicles.