I was installing a water filter on my air pump today so I took some photos of what I use. The connection to the pump is an old tire stem with the rubber stripped off and a brass nipple soldered into the end. I use a 1000-1300 mah 3S LiPo battery. It all stuffs into the top of the pump and it is easily held in one hand. Compressor is a Slime brand from Walmart for $20.



Hope this helps,
Gary