The Mini JST-XH extension cable is designed to make it easier to connect your single cell LiPo battery to it's charger, or to allow for remote mounting of your single cell LiPo.
If you own a Kyosho minimum aircraft you will need a JST extension lead to connect any other manufacturers single cell LiPo, such as our Zippy or Turnigy 1S LiPos, to the standard Kyosho charger.