Due to the complexity of battery transportation safety regulations, we decided from the very beginning of the design process not to include a battery, allowing the music box to be shipped to as many countries as possible.

If you need to use the music box on the go, the N20 Standard, N40 Standard, and N40 Sublime all support USB-C power banks, allowing you to easily take the music box anywhere you go.

Compatible power bank specifications: Minimum of 45W USB-C power supply. Please use a model that supports 15V voltage and at least 3A current (45W 15V/3A).

For example, the following power bank is one of the models we used in internal testing: https://www.mi.com/tw/20000mAh-mi-power-bank-3-pro/specs/