The Starlink Mini typically uses around 2 amps, which equates to roughly 20 watts. This is 50% compared to the Standard Starlink Kit which cannot run off 12v very easily.
It can be powered by a USB-C PD source or a compatible power bank / power station.
A variety of power cables and adaptors are available online, including USB-C patch cables, Anderson connectors, and integrated 12V cigarette lighter cables.