Spektrum 7.4V 4000mAh 2S LiPo Transmitter Battery

Spektrum 7.4V 4000mAh 2S LiPo Transmitter Battery Overview

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.