About PKNOVA-PKNOVA aa battery especially powered for wireless keyboard and mouse. Also applies to household items like remotes, toys, and more. 1.5 V High Performance-Even at temperatures as low as -4°F degrees or as high as 129°F degrees, double a battery will still operate at optimal performance. Wide Application-Best used on holiday light,Halloween Thanksgiving Christmas light battery,veryday applications such as TV remote battery, wireless mouses,keyboards, clocks, flashlights, toys, remote controls, and much more. Disposable Double AA Battery-Lr6 aa batteries contain no mercury or cadmium, making them a smart choice for your family and for the environment.Please note our LR6 AA batteries can not be charged. After-Sales Service-If you have any questions, please feel free to contact us. We are committed to providing the highest quality products and outstanding customer service.