Common Sense RC 2-Pack of Lectron Pro 3.7 Volt - 100mAh 20C Lipo Batteries for Estes Proto X / Syncro X Nano Quadcopter

These 100mAh batteries are the perfect size, weight and shape for the Estes Proto X / Syncro X / Hubsan Q4 nano quadcopter. They also feature the right connector to make them plug-and-play compatible with the Proto X / Syncro X -- that's right, despite what the manufacturer says about the Proto X's battery not being replaceable, our battery is designed to plug directly into the quad's main board, no soldering or adapters required. Also, the canopy will fit the same way it does with your stock battery!

Flight Time Per Battery: 3.5 to 4 minutes