Battery Type Selection: Each charging bank can be selected to your specific battery type (AGM, gel 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 Battery Equalization: Cleans and protect your battery (flooded lead acid only) every time you plug in. Also activates a more rigorous, complete cleaning at the push of a button Waterproof Construction: All on-board chargers are built to be waterproof, shock-resistant and vibration-resistant