The 4 Mode choices: MODE 1 is the normal mode, when chosen the (sun) symbol will be displayed on the LCD screen. This mode is recommended for charging batteries in temperatures > 0 Degree Celcius MODE 2 is the winter mode, when chosen the (snowflake) symbol will be displayed on the LCD screen. This mode is recommended for charging batteries in temperatures 0 Degree Celcius. MODE 3 is the silent mode, when chosen the (SMALL) symbol will be displayed on the LCD screen. This mode is recommended for charging small capacity batteries with an output of 2A max. During the silent mode, the fan turns off.
