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, Lithium, LiFePo4, Wet, 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, Lithium, LiFePo4, Wet, lead Acid, etc