With improved modern circuitry, it is now possible for battery powered amps to produce a loud and clear sound with great tone that lasts for hours, all without the need for any mains power source! Portable, battery powered amps are perfect for buskers or performances in remote locations where power is unavailable. These amps can be used just like a regular electric or acoustic guitar amp, but also can be used to amplify other instruments with a Hi-Z output. Portable amps can also be a great addition to a portable PA system, avoiding extra hazardous power cables.