Spektrum 7.4V 4000mAh 2S 15C Smart G2 Receiver LiPo Battery (SPMX-1057)

Spektrum 7.4V 2S Smart G2 LiPo Receiver Battery is a 4000mAh, 15C two-cell lithium-polymer pack designed to power RC receivers and onboard electronics. It pairs with Spektrum Smart chargers and uses the IC3 data wire to balance charge through a single connection, making charging simpler and safer.

Smart G2 technology stores essential data in an on-board microchip and automatically discharges to a safe storage voltage of 3.90V after 72 hours of inactivity, three times faster than the previous G1 design. The soft-case pack includes thicker internal metal side plates for improved heat dissipation and cell protection, and IC3 connectors are backward compatible with EC connectors. A Spektrum Smart charger is required to access the full range of smart features and auto-settings.