2 x Zeee 7.4V 50C 2200mAh 2S Shorty LiPo Battery Soft Case with XT60 Connector. Connector Type:XT60 Connector. Capacity: 2200mAh. Battery Weight(dev.10g): 98g/3.45oz/pc. Balancer Connector Type: JST-XH.
eBay