Amazon.com: 2 Pack 3.7V 100mAh Lipo Battery for WLtoys V272,Cheerson CX-10 Mini Quadcopter Estes Proto X, Syncro X Drone : Toys & Games
Teardown: A tiny drone and its controller - EDN
Amazon.com: 3.7V 100mAh 20C Lipo Battery for WLtoys V272,Cheerson CX-10 Mini Quadcopter Estes Proto X, Syncro X, Hubsan Q4 Nano Quadcopter 4 Pack with USB Charger : Toys & Games
Cheerson CX-23: A GPS Drone with Good Features and a Low Price - Half Chrome Drones