The item is a professional and practical 3.7V Lipo battery, which features 400mAh high capacity, and is for replacing the old or original battery of quadcopter. The 3.7V lipo battery can easily provide power for your toy and make it fly longer. Features - Color: Random Color. - Material: Lithium battery - Size: About 3.8x2x0.8cm. - Rated voltage: 3.7V. - Battery capacity: 400mAh. - Battery plug: air-to-air plug - Discharge rate: 25C - Battery weight: 10.7g - 400 mAh capacity, battery with protective plate, stable discharge. - to provide power for your quadcopter and make it fly longer. - A great replacement 3.7V battery for your old or broken original battery of your aircraft toy. - High performance, it is easy and safe to use. - A practical quadcopter toy accessory and give you more comfortable experience. Package list: 1 x lipo battery