Battery powered portable speakers

Batteries

— powered by replaceable elements of a standard size, such as "finger" AA. Such elements can be both disposable and reusable (rechargeable). Like original batteries (see "from the battery"), they allow you to use acoustics even if there are no outlets nearby; at the same time, an important advantage is the ability to quickly replace dead batteries, which makes the speakers even more independent of external power sources. On the other hand, this option is somewhat more expensive to operate: batteries are usually not included in the kit, while disposable cells need to be purchased regularly, and rechargeable ones are quite expensive.