Features 1、Applicable Model: 3.7V 400mAh lithium battery is suitable for WLtoys XK A210, A220, A250, A260, A290, A100, A110, A120, A130, A500 and other remote control aircraft. 2、Replacement Parts: 3.7V 400mAh lithium battery can provide you excellent replacement parts for your old or damaged parts. 3、Good Features: 3.7V 400mAh lithium battery for WLtoys XK A500 has strong power, large capacity, long endurance. 4、Closely Fitting: 3.7V 400mAh lithium ion battery closely fits the original hole position with accurate shape and size. 5、Light and Portable: The light weight and small size make 3.7V 400mAh battery easy to carry, will not increase burden. Specification Item Type: 3.7V 400mAh Lithium Battery Capacity: 400mAh Voltage: 3.7V Discharge Rate: 25C Material: Lithium ion Color: As Pictures Shown Weight: Approx. 13g / 0.5oz Product Size: Approx. 40x20x7mm / 1.6x0.8x0.3in Applicable Model: Suitable for WLtoys XK A210, A220, A250, A260, A290, A100, A110, A120, A130, A500 and Other Remote Control Aircraft Package List 1 x Battery