Did some research and found besides the drill type air filler, Ryobi has a larger 18v battery one with an on/off switch and digital psi set and readout. Goes to 150psi. Since I already have the batteries for it, I stopped by Home Depot and bought it for $39.
At home, I gave it a try and it does fine raising the psi in my MH's tires a few pounds and allows me to add air to my rear air bags easily. I just set the psi, attach it and turn it on and it shuts off when preset psi is reached. Found it to provide exactly what I was looking for, a quick and easy way to just top off the tires and adjust the rear air bags. By the way, I found it took a 1/2 minute to add 5 psi to the tires.
Ryobi Air Filler