• DX9 and DX9 Black Edition
  • DX8 Gen 1
  • DX7S
  • DX20 (Stock Replacement)

Key Features

  • Built-in cell balancer
  • Built-in safety current prevents overcharging


The 4000 2S LiPo offers long flight time, as well as advanced safety and features. It includes a built-in safety current that shuts the battery off, to avoid overcharging and damaging the battery and radio. Plus, a built-in balancing system ensures you get the longest life and power from your pack.