Battery Type Selection: Each charging bank can be selected to your specific battery type (Lithium (LiFePO4) AGM or flooded lead acid) to guarantee a safe, protected charge Automatic Temperature Compensation: Precision chargers sense and adjust to ambient temperature fluctuations to ensure a fast, accurate charge Low-Line Voltage Compensation: When outlets don't put out the 120 volts they are supposed to, Precision Chargers compensate to deliver a fast, consistent charge no matter what Waterproof Construction: All on-board chargers are built to be waterproof, shock-resistant and vibration-resistant Supported Battery Types: 12v AGM, 12v Flooded Lead Acid, 12v Lithium LiFePO12