Mroinge 12V Battery Charger is much more than a trickle charger. It has a brain, is lightweight, compact, fully automatic and very easy to use especially in small spaces, that digitally controls the 4 stages of battery charging (Initialization, Bulk Charge, Absorption Mode, Float Mode). This battery charger will keep the battery fully charged so that it is ready to go always. It has a microprocessor controlled fully automatic charger and maintainer and is designed to extend the life of any lead acid battery commonly used in automobiles, motorcycles, ATVs, personal watercraft, RVs, boats, airplanes, golf carts, back-up generator systems, etc. Any vehicle or battery-operated piece of equipment not used on a daily or regular basis is a candidate for a Mroinge charger. The advanced technology will bring the battery back to a full charge without overcharging and then float or maintain the battery for an indefinite period of time. The Mroinge comes equipped with big alligator clips and O-ring terminals for easy hook up. the DC cord total length of 12ft. Warning You MUST NOT connect to 6V And 24V or other unsuitable batteries (e.g. NiCd-batteries). The battery charger is not designed as a power supply. Not following these instructions could cause serious personal injury or material damage.