Carrera Lithium-Polymer replacement battery for the wireless controller 10111. Battery 3.7V - 150mAh for 2.4GHz wireless controller. This product is marked with the symbol for the selective disposal of electrical equipment (WEEE). This means that this product must be disposed of in accordance with EU Directive 2012/19/EU to minimize environmental damage. For more information, please contact your local or regional authority. Electronic products excluded from this selective disposal process pose a risk to the environment and health due to the presence of hazardous substances.