Sbarra

hello everyone, i am making an upgrade to an equatorial mount from my current star tracker.Im getting the skywatcher HEQ5 and it requires a power source. Im trying to keep costs down when looking at a power source for the mount. i have Milwaukee M18 batteries and can get this adapter. will this be good or do i need to look at something else? https://www.peaveymart.com/outdoor-equipment/generators/inverters/milwaukee-m18-top-off-175w-power-supply-tool-/3521961?gad_source=1&gclid=Cj0KCQjw8pKxBhD_ARIsAPrG45n-RaQe6-LjTvYg_VBvlVb0lvHzK5KlVI0i-7JGBB5uXJtH3z49qBQaAkt2EALw_wcB&gclsrc=aw.ds