Fly Kool 3.7v 680mah 20c Li-Po Battery 5 PCS For UDI U45 Syma X5 X5C CX-30W Quadcopters Spare Part RC Accessories Wholesale Model Number 3.7v 680mah 20c lipo battery Upgraded battery offers more power, more safety and higher performance for your quad copter. Enjoy over 10 minutes flight on one charge. Compact and solid body ensures the battery more stable and shockproof Battery size:40*25*8.5mm If you have any problem with our products,pls contact me immicately,we will try our best to solve your problems!