Apple allegedly thought about creating a portable version of the HomePod
with a battery, with a report claiming a prototype was produced but not
turned into a final product.
A HomePod mini and a USB-C battery pack. Both the HomePod and the HomePod
mini are designed for use indoors, with each equipped with power cables
and to be plugged into an outlet. While Apple doesn’t currently sell a
portable version, it did once consider the possibility.