Fully automatic, click and connect 7 step battery charger and maintainer that is suitable for batteries from 1.2Ah-85Ah. Features include battery diagnosis to establish whether your battery can receive and retain a charge, a patented desulphation program and a Snowflake program for charging on cold days. It also includes selectable programs for charging smaller and normal batteries. The MXS 3.8 uses CTEK s patented float/pulse system, which is the most efficient maintenance mode when a battery is connected for long periods. The MXS 3.8 is simple to use and you can follow the whole charging process on the clear, easy to read display. Reverse polarity protected. 5-year warranty.