ZIYIXIN Mini Helicopter, Smaller RC Helicopter Indoor Aircraft with Altitude Hold, One Key take Off/Landing, Rechargeable Battery, Remote Control Toy for Kid Beginner - Walmart.com
Amazon.com: Blomiky 2-Pack 3.7 Volt - 150mAh Li-Poly Pack Replacement for S yma S107 / S107G Helicopter / S107G Battery 2 : Electronics