You can manually select 5 modes for charging: 2a, 8a, automatic, 20a, and 25a. When the "Booster" mode is selected, the charging current can reach the maximum value. You don't need to do anything. Types of batteries : For most battery types including Calcium,Gel AGM,Wet .

Brand: Unbranded
Accessories: Charging Cable, Clamps, User Manual
Type: Charger
Warranty: 1 Year
Voltage: 12V/24V
Features: Automatic, Portable