Amazon.com: 2PCS 7.4V 2700mAh Drone Lithium Battery with 2 in 1 Charger for Hubsan x4 H501S Pro H501A H501C H501S H501M H501S W H501S pro Brushless Quadcopter Drone : Toys & Games
Original Hubsan LiPo battery 7.6V 550mAh 4.18Wh for Hubsan H507A X4 Star Pro with APP GPS and USB charger - AliExpress