Spektrum DX7s/DX8/DX9 7.4v 4000mAh 2S LiPo Transmitter Battery SPMB4000LPTX

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.

Features:

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

Compatible With:
DX9 and DX9 Black Edition
DX8 Gen 1
DX7S
DX20 (Stock Replacement)