These are charger leads that will connect your charger to your battery.nOn one end is the 4mm Bullet Plug (also known as Banana plug) which will plug into the output ports on your charger. On the other end is the JST Male which will plug into your battery that has a JST Connector installed.nHigh Quality Wires and PlugsnApprox. 10u0026#34; Total LengthnNote: Be sure that your charger has 4mm Output Ports for charging.n