This remote control battery is perfect for your Harmony 880 remote. With a capacity of 950mAh, it will ensure that your remote stays powered for longer. It is compatible with the MX890 model and is a great replacement for your old battery. This battery is designed specifically for your Harmony 880 remote, ensuring that it fits perfectly and provides optimal performance. It is easy to instal and will provide you with a reliable source of power for your remote. The battery is categorised under Remote Controls, TV & Home Audio Accessories, and Sound & Vision, making it the perfect addition to your home entertainment system.