Feature: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 BatteryCapacity: 400mAhVoltage: 3.7VDischarge Rate: 25CMaterial: Lithium ionColor: As Pictures ShownWeight: Approx. 13g / 0.5ozProduct Size: Approx. 40x20x7mm / 1.6x0.8x0.3inApplicable Model: Suitable for WLtoys XK A210, A220, A250, A260, A290, A100, A110, A120, A130, A500 and Other Remote Control Aircraft.Package List:1 x BatteryNote:Pure battery delivery.