Last year, I bought the Scoprega Bravo SuperTurbo BST 12 HP equipped with a rechargable 7Ah battery, as mentioned above. Without battery, it's $175 at Defender. Did a Google search and found it cheaper with battery on the Internet. Got it because we weren't going to tow the dingy around the Santa Barbara Isles or San Francisco Bay, but pump it up every time we needed it.
Used it for the summer, and it works great, inflates the 11' Achilles in ~5 min, with me just moving the nozzle from port to port. It also has a high pressure setting for the inflatable floor, and you can dial the desired pressure. Also runs as a deflator. Yes, it's another gadget and cost $175. Don't know how I was allowed to get it, but offering to split the pumping, in and out, may have done it.
I mention the "without battery" because I installed a 12 Vdc plug in the stbd lazerette, from which I can run the pump from the boat batteries. Lighter, easier more dependable. I had to disconnect the pump battery and put a plug on the leads. If anyone wants a battery, I have a spare one. If you have a choice, buy without battery.
Good pump, hope it lasts. Made in Italy
Boris