QuadLink® 4-Channel Charger Multiplier lets you use any single 6-Volt or 12-Volt battery maintenance charger on up to four lead-acid batteries. The four-way switcher circuit is capable of charging the batteries whether they are separately and individually connected or connected in a 24-, 36- or 48-Volt series string connected as a group. The simple plug and play system charges the batteries sequentially in ten minute intervals and comes with four eyelet lug adapter cables and 5' extension leads.