Syma X5HC and X5HW 1200 mah Battery easy mod to add a pull strap - YouTube
Amazon.com: sea jump 2PCS 3.7V 1200mah Lithium Battery for SYMA X5S X5SC X5SW X5SW-1 RC Helicopter Parts UAV Lithium Battery : Toys & Games
Amazon.com: Synergy Digital FPV Battery, Compatible with Syma X5UW FPV, (Li-Pol, 3.7V, 1200mAh) Ultra High Capacity, Replacement for Syma LT124RX Battery : Toys & Games
Amazon.com: Synergy Digital FPV Battery, Compatible with Syma X5UW FPV, (Li-Pol, 3.7V, 1200mAh) Ultra High Capacity, Replacement for Syma LT124RX Battery : Toys & Games