Multi-Use: Turn any 6V or 12V battery charger into a four-station maintenance charger capable of maintaining batteries whether they are individually connected or joined with others.
 
Effortless Use: It is also very useful for maintaining multiple 6V or 12V batteries in 24, 36, and 48V series connected configurations. The simple plug-and-play system maintains the batteries sequentially in fifteen-minute intervals and comes with four eyelet lug adapter cables and 5' extension leads.
 
 Add QuadLink to your existing 6-Volt or 12-Volt battery charger no matter what the brand
  Works on any kind of lead-acid battery that your battery charger can charge
  Includes 4 eyelet lug adaptor cables
  Includes 4 5' extensions leads
  Water-resistant
  5-Year Limited Warranty