So this one is actually has a stand alone battery in it. https://www.amazon.com/gp/product/B07V9WCBN7/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

I don't have my paddleboard yet (arrives tomorrow) but I used this unit to inflate my neighbors Costco Hyperlite Admiral board that is 11 feet long up to 15 psi and then deflated it empty again and it used about 20% of the battery to do both. It does come with various sealing rings to fit different board connections.