If you are looking to charge multiple batteries at a time, then this Battery Tender Management System is what you are looking for. It has the ability to charge up to ten 12-volt or 6-volt batteries simultaneously at 4 amps. It can be used for AGM/Standard/Gel or Lithium batteries.; Microchip circuitry will not activate output voltage until clips are correctly connected to the battery, thus avoiding short sparking Maintains batteries at full charge Clamps are included, as well as ten alligator clips with a 7.5 foot cable Three-year manufacturer's warranty