The battery for Bose Soundlink II and similar models is a high-quality Li-Ion battery specifically designed for use in Bose devices. Weighing 175.6 grams, this battery provides a reliable power source tailored to the specific requirements of the devices. The battery size is device-specific, ensuring an optimal fit and performance. This battery falls under the category of device batteries and is intended for use in portable audio devices. The use of lithium-ion technology ensures a long lifespan and high energy density, meaning users can expect improved performance and longer operating times. It is important to note that this battery is subject to labeling requirements, which means it is governed by certain regulations. The item is sold as a single unit and is a practical solution for anyone looking to maintain the performance of their Bose Soundlink devices.