COMMON SENSE RC Lectron Pro 7.4V 4000mAh 5C Lithium Polymer Transmitter Battery

This 2S 4000mAh lithium polymer battery pack is a perfect fit for the Spektrum DX7s, DX8, and DX9 transmitters, and offers twice as much runtime as the stock 2000mAh battery! This lipo also features an internal cell balancer and a built-in safety current circuit to prevent the battery from being overcharged and causing damage to both the battery and your radio.