Features: Fully automatic battery charging device effectively protects your battery from being overcharged. 7-stage charging device is suitable for most battery types of leadacid including Calcium, Gels, AGM, Wet, leadacid, etc. It will automatically activate the winter or summer charging mode according to the ambient temperature, without manual adjustment, improving charging efficiency. Built-in short circuit protecting, over voltage prootecting, overheat protecting, reverse polarity protecting, etc., safer for using. Intelligent digital display, you can clearly see the charge voltage, current, temperature, and repairing mode, battery status, etc. It can help restore drained and sulphated batteries, so that prolong the serive time of battery. Compact and lightweight, easy to carry. The outer is made of ABS material, insulation, retardant and high temperature resistant.